**Conversion of units** refers to **conversion factors** between different units of measurement for the same quantity. The former Weights and Measures office in Middlesex, England. ...
Quantity is a kind of property which exists as magnitude or multitude. ...
## Techniques
### Dimensioned values Carrying units through a mathematical operation is sometimes performed. e.g. to convert 6 feet into metres. From below one foot is exactly 0.3048 metre. Thus: - 6 ft × 0.3048 m/ft = 1.8288 m
This leaves only metres, the desired result. This works because the numerator and denominator describe the same quantity, the factor is equivalent to the number 1. Therefore, multiplication by this factor does not change the measured quantity, only its units.
### Rounding of results The process of making a conversion cannot produce a more precise result than the original quoted figure. Appropriate rounding of results is normally performed after conversion. (See significant figures). Rounding to n significant figures is a form of rounding. ...
In the above example the 0.3048 metre per foot is precise by definition, but the precision of the *answer* is determined by the precision of the 6 ft figure and in many cases the result would need rounding perhaps to 1.8 m.
## Tables of conversion factors ### Legend Legend ≡ | definition | = | exactly equal to | ≈ | approximately equal to | (`digits`) | indicates the digits repeat infinitely | ### Length Length Name of unit | Symbol | Definition | Relation to SI units | metre (SI base unit) | m | ≡ 1 m | = 1 m | ångström | Å | = 0.1 nm | ≡ 1×10^{−10} m | astronomical unit | AU | Mean distance from Earth to the Sun | = 149 597 870 691 ± 30 m | atomic unit of length | a_{0} | ≡ Bohr radius of hydrogen | ≈ 5.29 177 208 59×10^{−11} ± 3.6×10^{−20} m^{[1]} | barley corn | | ≡ ⅓ in | = 0.0846 m | Bohr radius | a_{0}; b | ≡ α/4π*R*_{∞} | ≈ 5.291 772 083×10^{−11} ± 19×10^{−20} m | cable length (Imperial) | | ≡ 608 ft | = 185.3184 m | cable length (International) | | ≡ 1/10 nmi | = 185.2 m | cable length (U.S.) | | ≡ 720 ft | = 219.456 m | calibre | cal | ≡ 1 in | = 0.000254 m | chain (Gunter's; Surveyor's) | ch | ≡ 66.0 ft (4 rods) | = 20.1168 m | chain (Ramsden's; Engineer's) | ch | ≡ 100 ft | = 30.48 m | cubit | | ≡ 18 in | = 0.4572 m | ell | ell | ≡ 45 in | = 1.143 m | fathom | fm | ≡ 6 ft | = 1.8288 m | fathom | fm | ≈ 1/1000 nmi | = 1.852 m | fermi | fm | ≡ 1×10^{−15} m | = 1×10^{−15} m | finger | | ≡ 7/8 in | = 0.00022225 m | finger (cloth) | | ≡ 4 ½ in | = 0.1143 m | foot (Benoît) | ft (Ben) | | ≈ 0.304 799 735 m | foot (Clarke's; Cape) | ft (Cla) | | ≈ 0.304 797 265 4 m | foot (Indian) | ft Ind | | ≈ 0.304 799 514 m | foot (International) | ft | ≡ 12 inches = 1/3 yd | = 0.3048 m | foot (Sear's) | ft (Sear) | | ≈ 0.304 799 47 m | foot (U.S. Survey) | ft (US) | ≡ 1200/3937 m ^{[2]} | ≈ 0.304 800 610 m | french; charriere | F | ≡ 1/3 mm | = 3.3 ×10^{−4} m | furlong | fur | ≡ 10 chains = 660 ft =220 yd | = 201.168 m | geographical mile | | ≡ 6082 ft | = 1853.7936 m | hand | | ≡ 4 in | = 0.1016 m | inch | in | ≡ 1/36 yd = 1/12 ft | = 0.0254 m | league | lea | ≡ 3 mi | = 4828.032 m | light-day | | ≡ 24 light-hours | = 2.590 206 837 12×10^{13} m | light-hour | | ≡ 60 light-minutes | = 1.079 252 848 8×10^{12} m | light-minute | | ≡ 60 light-seconds | = 1.798 754 748×10^{10} m | light-second | | | ≡ 2.997 924 58×10^{8} m | light-year | l.y. | ≡ *c*_{0} × 86 400 × 365.25 | = 9.460 730 472 580 8×10^{15} m | line | ln | ≡ 1/12 in (Klein 1988, 63) | ≈ 0,00 002 116 667 m | link (Gunter's; Surveyor's) | lnk | ≡ 1/100 ch | = 0.201 168 m | link (Ramsden's; Engineer's) | lnk | ≡ 1 ft | = 0.3048 m | mickey | | ≡ 1/200 in | = 1.27×10^{−4} m | micron | µ | | ≡ 1×10^{−6} m | mil; thou | mil | ≡ 1×10^{−3} in | = 2.54×10^{−5} m | mil (Sweden and Norway) | mil | ≡ 10 km | = 10000 m | mile | mi | ≡ 1760 yd = 5280 ft | = 1609.344 m | mile (U.S. Survey) | mi | ≡ 5280 ft (US) | = 5280 × 1200/3937 m ≈ 1609.347 219 m | nail (cloth) | | ≡ 2 ¼ in | = 0.000 571 5 m | nautical league | NL; nl | ≡ 3 nmi | = 5556 m | nautical mile(international) | NM; nmi | ≡ 1852 m ^{[3]} | 1852 m | nautical mile (Admiralty) | NM (Adm); nmi (Adm) | ≡ 6080 ft | ≡ 1853.184 m | pace | | ≡ 2.5 ft | = 0.762 m | palm | | ≡ 3 in | = 0.000 762 m | parsec | pc | | = 3.08567782 ×10^{16} ± 6×10^{6} m ^{[4]} | point (ATA) | pt | ≡ 0.013837 in | = 0.003 514 598 m | point (Didot; European) | pt | | ≡ 0.00 376 065 m | point (metric) | pt | ≡ 3/8 mm | = 0.00 375 m | point (PostScript) | pt | ≡ 1/72 in | ≈ 0.00 352 778 m | quarter | | ≡ ¼ yd | = 0.2286 m | rod; pole; perch | rd | ≡ 16 ½ ft | = 5.0292 m | rope | rope | ≡ 20 ft | = 6.096 m | span | | ≡ 6 in | = 0.1524 m | span (cloth) | | ≡ 9 in | = 0.2286 m | spat[3] | | ≡ 10^{12} m | = 1×10^{12} m | stick | | ≡ 2 in | = 0.05 08 m | stigma; pm | | ≡ 1×10^{−12} m | ≡ 1×10^{−12} m | telegraph mile | mi | ≡ 6087 ft | = 1855.3176 m | twip | twp | ≡ 1/1440 in | ≈ 1.763 889×10^{−5} m | x unit; siegbahn | xu | | ≈ 1.0021×10^{−13} m | yard (International) | yd | ≡3 ft ≡ 36 in | = 0.9144 m^{[2]} | For other uses of this word, see Length (disambiguation). ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
This article is about the unit of length. ...
The SI system of units defines seven SI base units: physical units defined by an operational definition. ...
An Ã¥ngstrÃ¶m or aangstroem (the official transliteration), or angstrom (symbol Ã…) is a non-SI unit of length that is internationally recognized, equal to 0. ...
The astronomical unit (AU or au or a. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central nucleus. ...
The fine-structure constant or Sommerfeld fine-structure constant, usually denoted , is the fundamental physical constant characterizing the strength of the electromagnetic interaction. ...
The Rydberg constant, named after physicist Janne Rydberg, is a physical constant discovered when measuring the spectrum of hydrogen, and building upon results from Anders Jonas Ã…ngstrÃ¶m and Johann Balmer. ...
A cable length is a nautical unit of measure, for which at least four definitions seem to exist: Common definition: 1/10 nautical mile, i. ...
The word caliber (American English) or calibre (British English) comes from the Italian calibro, itself from the Arabic quâlib, meaning mould. ...
As a unit of measurement within the Imperial system, the chain (surveyors chain, Gunters chain) is defined as 22 yards, 66 feet, or four rods. ...
Edmund Gunter (1581 - December 10, 1626), English mathematician, of Welsh extraction, was born in Hertfordshire in 1581. ...
As a unit of measurement within the Imperial system, the chain (surveyors chain, Gunters chain) is defined as 22 yards, 66 feet, or four rods. ...
Jesse Ramsden (October 6, 1735 - November 5, 1800) was an English astronomical instrument maker. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
â€¹ The template below (Unit of length) is being considered for deletion. ...
The geographical mile is a unit of length determined by 1 minute of arc along the Earths equator, approximately equal to 1855 metres (6087. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
For other uses, see league. ...
A light day (also written light-day) is a unit of length. ...
A light hour (also written light-hour) is a unit of length. ...
A light minute (also written light-minute) is a unit of length. ...
A light second is a unit of length. ...
A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ...
A micrometre (American spelling: micrometer, symbol Âµm) is an SI unit of length equal to one millionth of a metre, or about a tenth of the diameter of a droplet of mist or fog. ...
A thou, also known as a mil, is a unit of length equal to one thousandth of an international inch. ...
A mil (Norwegian and Swedish for mile) is a unit of length, usually used to measure geographic distance, fairly common in Norway and Sweden. ...
â€œMilesâ€ redirects here. ...
â€œMilesâ€ redirects here. ...
A nautical mile or sea mile is a unit of length. ...
A nautical mile or sea mile is a unit of length. ...
A parsec is the distance from the Earth to an astronomical object which has a parallax angle of one arcsecond. ...
For the literary term, see Postscript. ...
A rod is a unit of length, equal to 5. ...
â€œMilesâ€ redirects here. ...
A twip (loosely from twentieth of a point) is a typographical measurement, defined as 1/20 of a typographical point. ...
The X-unit (symbol xu) is a unit of length formerly used to measure the wavelength of X-rays and gamma rays. ...
The X-unit (symbol xu) is a unit of length formerly used to measure the wavelength of X-rays and gamma rays. ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
### Area Area Name of unit | Symbol | Definition | Relation to SI units | acre | ac | ≡ 10 sq ch = 4840 sq yd | = 4046.856 422 4 m² | are | a | | ≡ 100 m² | barn | b | | ≡ 10^{−28} m² | barony | | ≡ 4000 ac | = 1.618 742 568 96×10^{7} m² | board | bd | ≡ 1 in × 1 ft | = 7.741 92×10^{−3} m² | boiler horsepower equivalent direct radiation | bhp EDR | ≡ (1 ft²) (1 bhp) / (240 BTU_{IT}/h) | ≈ 12.958 174 m² | circular inch | circ in | ≡ π/4 sq in | ≈ 5.067 075×10^{−4} m² | circular mil; circular thou | circ mil | ≡ π/4 mil² | ≈ 5.067 075×10^{−10} m² | cord | | ≡ 192 bd | = 1.486 448 64 m² | dunam | | ≡ 1000 m² | = 1000 m² | hectare | ha | ≡ 10 000 m² | = 10 000 m² | hide | | ≡ 100 ac | = 4.046 856 422 4×10^{5} m² | rood | ro | ≡ ¼ ac | = 1011.714 105 6 m² | square chain | sq ch | ≡ 1 sq ch | = 404.685 642 24 m² | square foot | sq ft | ≡ 1 sq ft | = 9.290 304×10^{−2} m² | square inch | sq in | ≡ 1 sq in | = 6.4516×10^{−4} m² | square kilometre | km² | ≡ 1 km² | = 10^{6} m² | square link | sq lnk | ≡ 1 lnk² | = 4.046 856 422 4×10^{−2} m² | square metre (SI unit) | m² | ≡ 1 m × 1 m | = 1 m² | square mil; square thou | sq mil | ≡ 1 sq mil | = 6.4516×10^{−10} m² | square mile; section | sq mi | ≡ 1 sq mi | = 2.589 988 110 336×10^{6} m² | square rod/pole/perch | sq rd | ≡ 1 sq rd | = 25.292 852 64 m² | square U.S. Survey foot | sq ft | ≡ 1 sq ft (US) | ≈ 9.290 341 161 327 49×10^{-2} m² | square U.S. Survey mile | sq mi | ≡ 1 sq mi (US) | ≈ 2.589 998×10^{6} m² | square yard | sq yd | ≡ 1 sq yd | = 0.836 127 36 m² | stremma | | ≡ 1000 m² | = 1000 m² | township | | ≡ 36 sq mi (US) | ≈ 9.323 994×10^{7} m² | yardland | | ≡ 30 ac | = 1.214 056 926 72×10^{5} m² | Area is the measure of how much exposed area any two dimensional object has. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
This article is about the unit of measurement. ...
An are (symbol a) is a unit of area, equal to 100 square meters (10 m Ã— 10 m), used for measuring land area. ...
A barn (symbol b) is a unit of area. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A dunam or dÃ¶nÃ¼m, dunum, donum is a unit of area. ...
A hectare (symbol ha) is a unit of area, equal to 10 000 square metres, commonly used for measuring land area. ...
The hide was a variable unit of land area used in medieval England, defined according to its arable yield and taxable potential rather than its exact dimensions. ...
A square foot is by definition the area enclosed by a square with sides each 1 foot long. ...
A square inch is by definition the area enclosed by a square with sides each 1 inch long. ...
Square kilometre (U.S. spelling: square kilometer), symbol kmÂ², is a decimal multiple of SI unit of surface area square metre, one of the SI derived units. ...
A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. ...
This article is about the unit of length. ...
â€œMilesâ€ redirects here. ...
For other uses, see Foot (disambiguation). ...
â€œMilesâ€ redirects here. ...
-1...
The stremma (Greek:ÏƒÏ„ÏÎÎ¼Î¼Î±, plural ÏƒÏ„ÏÎÎ¼Î¼Î±Ï„Î±) is a Greek unit of land area, equal to 1000 square metres, also called the royal stremma. ...
Survey township, sometimes called Congressional township, as used by the United States Public Land Survey System, refers to a square unit of land, that is nominally six (U.S. Survey) miles (~9. ...
### Volume Volume Name of unit | Symbol | Definition | Relation to SI units | acre foot | ac ft | ≡ 1 ac x 1 ft = 43560 ft³ | = 1233.5 m³ | cubic metre (SI unit) | m³ | ≡ 1 m × 1 m × 1 m | = 1 m³ | litre | L | ≡ 1 dm³ ^{[5]} | = 0.001 m³ | lambda | λ | ≡ 1 mm³ | = 1 ×10^{−9} m³ | drop (metric) | | ≡ 1/20 mL | = 5 ×10^{−9} m³ | minim (Imperial) | min | ≡ 1/480 fl oz (Imp) = 1/60 fl dr (Imp) | ≈ 5.9 193 880 208 333 ×10^{−9} m³ | minim (U.S.) | min | ≡ 1/480 US fl oz = 1/60 US fl dr | = 6.1 611 519 921 875 ×10^{−9} m³ | drop (U.S.) (alt) | gtt | ≡ 1/456 US fl oz | ≈ 6.4 854 231 ×10^{−9} m³ | drop (Imperial) (alt) | gtt | ≡ 1/1824 gi (Imp) | ≈ 7.7 886 684 ×10^{−9} m³ | drop (U.S.) | gtt | ≡ 1/360 US fl oz | = 8.2 148 693 229 16 ×10^{−9} m³ | drop (medical) | | ≡ 1/12 mL | = 83 ×10^{−9} m³ | drop (Imperial) | gtt | ≡ 1/288 fl oz (Imp) | = 9.8 656 467 0138 ×10^{−9} m³ | dash (U.S.) | | ≡ 1/96 US fl oz = ½ US pinch | = 0.0308 057 599 609 375 ×10^{−6} m³ | dash (Imperial) | | ≡ 1/384 gi (Imp) = ½ pinch (Imp) | = 0.0369 961 751 302 083 ×10^{−6} m³ | pinch (U.S.) | | ≡ 1/48 US fl oz = ⅛ US tsp | = 0.0616 115 199 218 75 ×10^{−6} m³ | pinch (Imperial) | | ≡ 1/192 gi (Imp) = ⅛ tsp (Imp) | = 0.0739 923 502 604 16 ×10^{−6} m³ | fluid scruple (Imperial) | fl s | ≡ 1/24 fl oz (Imp) | = 0.1183 877 604 16 ×10^{−6} m³ | fluid drachm (Imperial) | fl dr | ≡ ⅛ fl oz (Imp) | = 0.3551 632 812 5 ×10^{−6} m³ | fluid dram (U.S.); U.S. fluidram | fl dr | ≡ ⅛ US fl oz | = 0.3696 691 195 312 5 ×10^{−6} m³ | teaspoon (Canadian) | tsp | ≡ 1/6 fl oz (Imp) | ≈ 0.4735 510 416 667 ×10^{−6} m³ | teaspoon (U.S.) | tsp | ≡ 1/6 US fl oz | = 0.4928 921 595 ×10^{−6} m³ | teaspoon (metric) | | | ≡ 0.5 ×10^{−6} m³ | teaspoon (Imperial) | tsp | ≡ 1/24 gi (Imp) | = 0.5919 388 020 83 ×10^{−6} m³ | dessertspoon (Imperial) | | ≡ 1/12 gi (Imp) | = 1.1838 776 0416 ×10^{−6} m³ | tablespoon (Canadian) | tbsp | ≡ ½ fl oz (Imp) | = 1.4206 531 25 ×10^{−6} m³ | tablespoon (U.S.) | tbsp | ≡ ½ US fl oz | = 1.4786 764 782 5 ×10^{−6} m³ | tablespoon (metric) | | | ≡ 1.5 ×10^{−6} m³ | cubic inch | cu in | ≡ 1 cu in | = 1.6387 064 ×10^{−6} m³ | tablespoon (Imperial) | tbsp | ≡ 5/8 fl oz (Imp) | = 1.7758 164 0625 ×10^{−6} m³ | pony | | ≡ 3/4 US fl oz | = 2.218 014 717 187 5 ×10^{−6} m³ | fluid ounce (Imperial) | fl oz (Imp) | ≡ 1/160 gal (Imp) | = 2.8413 062 5 ×10^{−6} m³ | fluid ounce (U.S.) | US fl oz | ≡ 1/128 gal (US) | = 2.9573 529 5625 ×10^{−6} m³ | shot | | ≡ 1 US fl oz | = 2.9573 529 5625 ×10^{−6} m³ | jigger | | ≡ 1½ US fl oz | = 4.4360 294 343 75 ×10^{−6} m³ | gill (U.S.) | gi (US) | ≡ 4 US fl oz | = 11.8294 118 25 ×10^{−6} m³ | gill (Imperial); Noggin | gi (Imp); nog | ≡ 5 fl oz (Imp) | = 14.2065 312 5 ×10^{−6} m³ | cup (Canadian) | c (CA) | ≡ 8 fl oz (Imp) | = 22.73045 ×10^{−6} m³ | cup (U.S.) | c (US) | ≡ 8 US fl oz ≡ 1/16 gal (US) | = 23.6588 2365 ×10^{−6} m³ | cup (metric) | c | | ≡ 25.0 ×10^{−6} m³ | breakfast cup | | ≡ 10 fl oz (Imp) | = 28.4130 625 ×10^{−6} m³ | pint (U.S. fluid) | pt (US fl) | ≡ ⅛ gal (US) | = 47.3176 473 ×10^{−6} m³ | pint (U.S. dry) | pt (US dry) | ≡ 1/64 bu (US lvl) ≡ ⅛ gal (US dry) | = 0.000 550 610 471 3575 m³ | pint (Imperial) | pt (Imp) | ≡ ⅛ gal (Imp) | = 0.000 568 261 25 m³ | fifth | | ≡ 1/5 US gal | = 0.000 757 082 356 8 m³ | quart (U.S. fluid) | qt (US) | ≡ ¼ gal (US fl) | = 0.000 946 352 946 m³ | quart (U.S. dry) | qt (US) | ≡ 1/32 bu (US lvl) = ¼ gal (US dry) | = 0.001 101 220 942 715 m³ | quart (Imperial) | qt (Imp) | ≡ ¼ gal (Imp) | = 0.001 136 522 5 m³ | pottle; quartern | | ≡ ½ gal (Imp) = 80 fl oz (Imp) | = 0.002 273 045 m³ | board-foot | fbm | ≡ 144 cu in | = 0.002 359 737 216 m³ | gallon (U.S. fluid; Wine) | gal (US) | ≡ 231 cu in | = 0.003 785 411 784 m³ | gallon (U.S. dry) | gal (US) | ≡ ⅛ bu (US lvl) | = 0.004 404 883 770 86 m³ | gallon (Imperial) | gal (Imp) | ≡ | = 0.004 546 09 m³ | beer gallon | beer gal | ≡ 282 cu in | = 0.004 621 152 048 m³ | peck (U.S. dry) | pk | ≡ ¼ US lvl bu | = 0.008 809 767 541 72 m³ | peck (Imperial) | pk | ≡ 2 gal (Imp) | = 0.009 092 18 m³ | bucket (Imperial) | bkt | ≡ 4 gal (Imp) | = 0.018 184 36 m³ | timber foot | | ≡ 1 cu ft | = 0.028 316 846 592 m³ | cubic foot | cu ft | ≡ 1 ft × 1 ft × 1 ft | = 0.028 316 846 592 m³ | firkin | | ≡ 9 gal (US) | = 0.034 068 706 056 m³ | bushel (U.S. dry level) | bu (US lvl) | ≡ 2150.42 cu in | = 0.035 239 070 166 88 m³ | bushel (Imperial) | bu (Imp) | ≡ 8 gal (Imp) | = 0.036 368 72 m³ | bushel (U.S. dry heaped) | bu (US) | ≡ 1 ¼ bu (US lvl) | = 0.044 048 837 708 6 m³ | strike (U.S.) | | ≡ 2 bu (US lvl) | = 0.070 478 140 333 76 m³ | strike (Imperial) | | ≡ 2 bu (Imp) | = 0.072 737 44 m³ | kilderkin | | ≡ 18 gal (Imp) | = 0.081 829 62 m³ | sack (U.S.) | | ≡ 3 bu (US lvl) | = 0.105 717 210 500 64 m³ | sack (Imperial); bag | | ≡ 3 bu (Imp) | = 0.109 106 16 m³ | barrel (U.S. dry) | bl (US) | ≡ 105 qt (US) = 105/32 bu (US lvl) | = 0.115 628 198 985 075 m³ | barrel (U.S. fluid) | fl bl (US) | ≡ 31½ gal (US) | = 0.119 240 471 196 m³ | coomb | | ≡ 4 bu (Imp) | = 0.145 474 88 m³ | barrel (petroleum) | bl; bbl | ≡ 42 gal (US) | = 0.158 987 294 928 m³ | barrel (Imperial) | bl (Imp) | ≡ 36 gal (Imp) | = 0.163 659 24 m³ | hogshead (U.S.) | hhd (US) | ≡ 2 fl bl (US) | = 0.238 480 942 392 m³ | seam | | ≡ 8 bu (US lvl) | = 0.281 912 561 335 04 m³ | quarter; pail | | ≡ 8 bu (Imp) | = 0.290 949 76 m³ | hogshead (Imperial) | hhd (Imp) | ≡ 2 bl (Imp) | = 0.327 318 48 m³ | cord-foot | | ≡ 16 cu ft | = 0.453 069 545 472 m³ | butt, pipe | | ≡ 126 gal (wine) | = 0.476 961 884 784 m³ | perch | per | ≡ 16½ ft × 1½ ft × 1 ft | = 0.700 841 953 152 m³ | cubic yard | cu yd | ≡ 27 cu ft | = 0.764 554 857 984 m³ | tun | | ≡ 252 gal (wine) | = 0.953 923 769 568 m³ | displacement ton | | ≡ 35 cu ft | = 0.991 089 630 72 m³ | water ton | | ≡ 28 bu (Imp) | = 1.018 324 16 m³ | freight ton | | ≡ 40 cu ft | = 1.132 673 863 68 m³ | wey (U.S.) | | ≡ 40 bu (US lvl) | = 1.409 562 806 675 2 m³ | load | | ≡ 50 cu ft | = 1.415 842 329 6 m³ | register ton | | ≡ 100 cu ft | = 2.831 684 659 2 m³ | last | | ≡ 80 bu (Imp) | = 2.909 497 6 m³ | cord (firewood) | | ≡ 8 ft × 4 ft × 4 ft | = 3.624 556 363 776 m³ | cubic fathom | cu fm | ≡ 1 fm × 1 fm × 1 fm | = 6.116 438 863 872 m³ | acre-inch | | ≡ 1 ac × 1 in | = 102.790 153 128 96 m³ | acre-foot | | ≡ 1 ac × 1 ft | = 1233.481 837 547 52 m³ | cubic mile | cu mi | ≡ 1 cu mi | = 4.168 181 825 440 579 584 ×10^{9} m³ | For other uses, see Volume (disambiguation). ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
An acre foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, and river flows. ...
The cubic meter (symbol mÂ³) is the SI derived unit of volume. ...
The litre or liter (see spelling differences) is a unit of volume. ...
Lambda (upper case Λ, lower case λ) is the 11th letter of the Greek alphabet. ...
The drop is a unit of measure of volume. ...
A minim is a small amount of fluid. ...
...
Also see the article : Greek drachma. ...
Also see the article : Greek drachma. ...
Image:Teaspoon sugar. ...
The most commonly used spoon in most houses the dessertspoon is probably what youre used to eating your breakfast with. ...
This tablespoon has a capacity of about 1 tbsp. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A fluid ounce is a unit of volume in both the Imperial system of units and the U.S. customary units system. ...
For other uses, see Gill (disambiguation). ...
The cup is a unit of measurement for volume, used in cooking to measure bulk foods, such as chopped vegetables (dry measurement), and liquids (fluid measurement). ...
The pint is an English unit of volume or capacity in the imperial system and United States customary units, equivalent in each system to one half of a quart, and one eighth of a gallon. ...
For other uses, see Quart (disambiguation). ...
The board-foot is a specialized unit of volume for measuring lumber in the United States and Canada. ...
The gallon (abbreviation: gal) is a unit of volume. ...
A 1/2 peck apple bag A peck is an Imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 8 dry quarts, or 16 dry pints. ...
A 1/2 peck apple bag A peck is an Imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 8 dry quarts, or 16 dry pints. ...
A bucket (bkt. ...
It has been suggested that Thousand Cubic Feet be merged into this article or section. ...
A Firkin is an old English unit of volume. ...
A table of weights from the secretaries of the different states, showing the no. ...
The kilderkin is an old English unit of brewery casks, holding about 82 litres. ...
The word sack can refer to: Look up sack in Wiktionary, the free dictionary. ...
â€œbblâ€ redirects here. ...
Coomb may refer to: Coomb, a rare Celtic Brythonic survival word; meaning a small deep dry valley, easily defended. ...
A hogshead is a large cask of liquid (less often, of a food commodity). ...
Seam may mean: A seam, in sewing, is the line where two or more layers of fabric are held together by thread. ...
This article is about the physical container. ...
The butt (from the medieval French and Italian ) or pipe is an old English unit of wine casks, holding about 477 litres or rather two hogsheads. ...
Species P. flavescens (Yellow perch) P. fluviatilis (European perch) P. schrenkii (Balkhash perch) For other meanings of the word perch, including fish not in the Perca genus, see Perch (disambiguation). ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
Look up ton in Wiktionary, the free dictionary. ...
Look up ton in Wiktionary, the free dictionary. ...
A wey is a unit of mass used in England since before 900 CE. The value of a wey has varied over time though was originally used to denote 2 hundredweight or 256 pounds. ...
For other uses, see Last (disambiguation). ...
Firewood, stacked to dry Bags of firewood logged from the Barmah Forest in Victoria Wood fuel is wood used as fuel. ...
A fathom is the name of a unit of length in the Imperial system (and the derived U.S. customary units). ...
An acre foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, and river flows. ...
â€œMilesâ€ redirects here. ...
### Angle Angle Name of unit | Symbol | Definition | Relation to SI units | radian | rad | ≡ 180°/π | 1 rad | centesimal second of arc | " | ≡ 1 grad/10000 | ≈ 1.57 079 6×10^{−6} rad | arcsecond | " | ≡ 1°/3600 | ≈ 4.84 813 7×10^{−6} rad | centesimal minute of arc | ' | ≡ 1 grad/100 | ≈ 15.708 0×10^{−6} rad | minute of arc | ' | ≡ 1°/60 | ≈ 29.088 8×10^{−6} rad | angular mil | µ | ≡ 2π/6400 rad | ≈ 98.174 8×10^{−6} rad | grad; gradian; gon | grad | ≡ 2π/400 rad = 0.9° | ≈ 1.570 796 3×10^{−3} rad | degree (of arc) | ° | ≡ π/180 rad | ≈ 1.745 329 3×10^{−3} rad | sign | | ≡ 30° | ≈ 0.523 599 rad | octant | | ≡ 45° | ≈ 0.785 398 rad | sextant | | ≡ 60° | ≈ 1.047 198 rad | quadrant | | ≡ 90° | ≈ 1.570 796 rad | This article is about angles in geometry. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
For the musical group, see Radian (band). ...
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 ≈ 7. ...
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 â‰ˆ 7. ...
A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60) of one degree. ...
A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60) of one degree. ...
The mil (in full, angular mil) is a unit of angular measure. ...
The grad is a measurement of plane angles of value 1/400 of a full circle, thus dividing a right angle in 100. ...
The gon is a measurement of plane angles, corresponding to 1/400 of a full circle, thus dividing a right angle in 100. ...
The gon is a measurement of plane angles, corresponding to 1/400 of a full circle, thus dividing a right angle in 100. ...
This article describes the unit of angle. ...
Can refer to a region of Euclidean 3-space with a specific sign for x, y and z coordinates. ...
Look up Quadrant on Wiktionary, the free dictionary Quadrant can mean: HMS Quadrant (G11), a WW-II British/Australian warship. ...
### Solid angle A solid angle is the three dimensional analog of the ordinary angle. ...
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The steradian (ste from Greek stereos, solid) is the SI derived unit of solid angle, and the 3-dimensional equivalent of the radian. ...
SI derived units are part of the SI system of measurement units and are derived from the seven SI base units. ...
### Mass *Note: see Weight for detail of mass/weight distinction and conversion* For other uses, see Weight (disambiguation). ...
Mass Name of unit | Symbol | Definition | Relation to SI units | kilogram, grave(SI base unit) | kg; G | | = 1kg | electron rest mass | m_{e} | | ≈ 9.109 381 88×10^{−31} ± 72×10^{−39} kg | atomic unit of mass | amu^{[citation needed]} | ≡ m_{e} | ≈ 9.109 381 88×10^{−31} ± 72×10^{−39} kg | unified atomic mass unit | u | | ≈ 1.660 538 73×10^{−27} ± 13×10^{−35} kg | dalton | Da | | ≈ 1.660 902 10×10^{−27} ± 13×10^{−35} kg | gamma | γ | | ≡ 1 ×10^{6} kg | point | | ≡ 1/100 kt (metric) | = 2 ×10^{6} kg | mite | | ≡ 1/20 gr | = 3.239 945 5 ×10^{6} kg | mite (metric) | | ≡ 1/20 g | = 50 ×10^{6} kg | grain | gr | | ≡ 64.798 91 ×10^{6} kg | crith | | | ≈ 89.9349 ×10^{6} kg | carat (metric) | ct | | ≡ 200 ×10^{6} kg | carat | kt | ≡ 3 1/6 gr | ≈ 205.196 548 333 ×10^{6} kg | sheet | | ≡ 1/700 lb av | = 647.9891 ×10^{6} kg | scruple (apothecary) | s ap | ≡ 20 gr | = 1.295 978 2 ×10^{3} kg | pennyweight | dwt; pwt | ≡ 1/20 oz t | = 1.555 173 84 ×10^{3} kg | dram (avoirdupois) | dr av | ≡ 27 11/32 gr | = 1.771 845 195 312 5 ×10^{3} kg | dram (apothecary; troy) | dr t | ≡ 60 gr | = 3.887 934 6 ×10^{3} kg | hyl (CGS unit) | | ≡ 1 gee × 1 g × 1 s²/m | = 9.806 65 ×10^{3} kg | ounce (avoirdupois) | oz av | ≡ 1/16 lb | = 28.349 523 125 ×10^{3} kg | assay ton (short) | AT | ≡ 1 mg × 1 sh tn ÷ 1 oz t | ≈ 29.166 667 ×10^{3} kg | ounce (apothecary; troy) | oz t | ≡ 1/12 lb t | = 31.103 476 8 ×10^{3} kg | assay ton (long) | AT | ≡ 1 mg × 1 long tn ÷ 1 oz t | ≈ 32.666 667 ×10^{3} kg | mark | | ≡ 8 oz t | = 248.827 814 4 ×10^{3} kg | pound (troy) | lb t | ≡ 5760 grains | = 0.373 241 721 6 kg | pound (avoirdupois) | lb av | ≡ 7000 grains | = 0.453 592 37 kg | pound (metric) | | | ≡ 500 ×10^{3} kg | clove | | ≡ 8 lb av | = 3.628 738 96 kg | stone | st | ≡ 14 lb av | = 6.350 293 18 kg | hyl (MKS unit) | | ≡ 1 gee × 1 kg × 1 s²/m | = 9.806 65 kg | quarter (Imperial) | | ≡ 1/4 long cwt = 2 st = 28 lb av | = 12.700 586 36 kg | slug; geepound | slug | ≡ 1 gee × 1 lb av × 1 s²/ft | ≈ 14.593 903 kg | bag (Portland cement) | | ≡ 94 lb av | = 42.637 682 78 kg | short hundredweight; cental | sh cwt | ≡ 100 lb av | = 45.359 237 kg | long hundredweight | long cwt or cwt | ≡ 112 lb av | = 50.802 345 44 kg | bag (coffee) | | ≡ 60 kg | = 60 kg | quintal (metric) | q | | ≡ 100 kg | wey | | ≡ 252 lb = 18 st (variants exist) | = 114.305 277 24 kg | long quarter (informal) | | ≡ ¼ long tn | = 254.011 727 2 kg | quarter (informal) | | ≡ ¼ short tn | = 226.796 185 kg | kip | kip | ≡ 1000 lb av | = 453.592 37 kg | short ton | sh tn | ≡ 2000 lb | = 907.184 74 kg | tonne (mts unit) | t | | ≡ 1000 kg | long ton | long tn or ton | ≡ 2240 lb | = 1016.046 908 8 kg | barge | | ≡ 22 ½ sh tn | = 20,411.656 65 kg | Zentner | Ztr. | Definitions vary; see ^{[6]} and ^{[7]}. See also discussion at Talk:Conversion of units#Zentner | | In physics, the pound of mass is sometimes written **lbm** to distinguish it from the pound-force (**lbf**). It should not be read as the mongrel unit "pound metre". For other uses, see Mass (disambiguation). ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
Kg redirects here. ...
now. ...
The SI system of units defines seven SI base units: physical units defined by an operational definition. ...
For other uses, see Electron (disambiguation). ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
The atomic mass unit (amu), unified atomic mass unit (u), or dalton (Da), is a small unit of mass used to express atomic masses and molecular masses. ...
The unified atomic mass unit (u), or dalton (Da), is a small unit of mass used to express atomic masses and molecular masses. ...
A grain is a unit of mass equal to 0. ...
The carat is a unit of mass used for measuring gems and pearls, and is exactly 200 milligrams. ...
The carat is a unit of mass used for measuring gems and pearls, and is exactly 200 milligrams. ...
The apothecaries system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. ...
Interior of an apothecarys shop. ...
A pennyweight (dwt) is an unit of mass which is the same as 24 grains, 1/240th of a troy pound, 1/20th of a troy ounce, approximately 0. ...
The avoirdupois (IPA: ; French IPA: ) system is a system of weights (or, properly, mass) based on a pound of sixteen ounces. ...
Also see the article : Greek drachma. ...
Troy ounce is a traditional unit of gold weight. ...
For other meanings, see Slug (disambiguation) The slug is an English and U.S. customary unit of mass. ...
This article is about Ounce (unit of mass). ...
Troy weight is a system of units of mass customarily used for precious metals and gemstones. ...
Look up pound in Wiktionary, the free dictionary. ...
Look up pound in Wiktionary, the free dictionary. ...
Look up pound in Wiktionary, the free dictionary. ...
The stone is a unit of mass in the Imperial system of weights and measures used in the United Kingdom, Ireland, and most Commonwealth countries. ...
For other meanings, see Slug (disambiguation) The slug is an English and U.S. customary unit of mass. ...
Sampling fast set Portland cement Portland cement is the most common type of cement in general usage, as it is a basic ingredient of concrete, mortar and plaster. ...
Hundred weight or hundredweight is a unit of measurement for mass in both the system of measurement used in the United Kingdom (and previously throughout the British Commonwealth), and in the system used in the United States. ...
Hundred weight or hundredweight is a unit of measurement for mass in both the system of measurement used in the United Kingdom (and previously throughout the British Commonwealth), and in the system used in the United States. ...
For other uses, see Coffee (disambiguation). ...
The quintal is a historical unit of mass with many different definitions in different countries. ...
A wey is a unit of mass used in England since before 900 CE. The value of a wey has varied over time though was originally used to denote 2 hundredweight or 256 pounds. ...
In the United States, a kip is a unit of force that equals 1,000 pounds, i. ...
The short ton is a unit of mass equal to 907. ...
This article is about the metric tonne. ...
The metre-tonne-second or mts system of units is a system of physical units introduced in the Soviet Union in 1933, but abolished in 1955. ...
A long ton is the name used in the US for the unit called the ton in the avoirdupois or Imperial system of measurements, as used (alongside the metric system) in the United Kingdom and to some extent in other Commonwealth countries. ...
A magnet levitating above a high-temperature superconductor demonstrates the Meissner effect. ...
Look up pound in Wiktionary, the free dictionary. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
### Time Time, t Name of unit | Symbol | Definition | Relation to SI units | second(SI base unit) | s | | = 1 s | Planck time | | ≡ (Gℏ/*c*^{5})^{½} | ≈ 1.351 211 818×10^{−43} s | atomic unit of time | au | ≡ a_{0}/(α·c) | ≈ 2.418 884 254×10^{−17} s | svedberg | S | ≡ 10^{−13} s | = 100 fs | shake | | ≡ 10^{−8} s | = 10 ns | sigma | | ≡ 10^{−6} s | = 1 μs | jiffy | | ≡ 1/60 s | ≈ .016667 s | jiffy (alternate) | | ≡ 1/100 s | = 10 ms | helek | | ≡ 1/1080 h | ≈ 3.333333 s | minute | min | | ≡ 60 s | milliday | md | ≡ 86 400 s / 1000 | ≡ 86.4 s | moment | | ≡ 90 s | ≡ 90 s | ke(traditional) | | ≡ 1/100 d | ≡ 864 s | quarter (of an hour) | ke | ≡ 1/96 d | ≡ 900 s | hour | h | ≡ 60 min | = 3600 s | day | d | ≡ 24 h | = 86 400 s | week | wk | ≡ 7 d | = 604 800 s | fortnight | | ≡ 2 wk | = 1 209 600 s | month (hollow) | mo | ≡ 29 d | = 2 505 600 s | month | mo | ≡ 30 d | = 2 592 000 s | month (full) | mo | ≡ 31 d | = 2 678 400 s | year (Calendar) | a, y, *or* yr | ≡ 365 d | = 31 536 000 s | year (Gregorian) | a, y, *or* yr | ≡ 365.2425 d | = 31 556 952 s | year (Julian) | a, y, *or* yr | ≡ 365.25 d | = 31 557 600 s | sidereal year | a, y, *or* yr | ≡ 365.256363 d | = 31 558 149.76 s | Olympiad | | ≡ 4 a of 365 d | = 1.2614×10^{8} s | lustre; lustrum | | ≡ 5 a of 365 d | = 1.5768×10^{8} s | octaeteris | | ≡ 8 a of 365 d | = 2.522 88×10^{8} s | decade | | ≡ 10 a of 365 d | = 3.1536×10^{8} s | enneadecaeteris; Metonic cycle | | ≡ 110 mo (hollow) + 125 mo (full) = 19 a of 365 d | = 5.996 16×10^{8} s | Callippic cycle | | ≡ 441 mo (hollow) + 499 mo (full) = 76 a of 365.25 d | = 2.398 377 6×10^{9} s | century (Calendar) | | ≡ 100 a of 365 d | = 3.1536×10^{9} s | century (Julian) | | ≡ 100 a of 365.25 d | = 3.155 76×10^{9} s | Hipparchic cycle | | ≡ 4 Callippic cycles - 1 d | = 9.593 424×10^{9} s | millennium (Calendar) | | ≡ 1000 a of 365 d | = 3.1536×10^{10} s | millennium (Gregorian) | | ≡ 1000 a of 365.2425 d | = 3.155 695 2×10^{10} s | millennium (Julian) | | ≡ 1000 a of 365.25 d | = 3.155 76×10^{10} s | Sothic cycle | | ≡ 1461 a of 365 d | = 4.607 409 6×10^{10} s | This article is about the concept of time. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
This article is about the unit of time. ...
The SI system of units defines seven SI base units: physical units defined by an operational definition. ...
In physics, the Planck time (tP), is the unit of time in the system of natural units known as Planck units. ...
The gravitational constant G is a key element in Newtons law of universal gravitation. ...
Plancks constant, denoted h, is a physical constant that is used to describe the sizes of quanta. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central nucleus. ...
The fine-structure constant or Sommerfeld fine-structure constant, usually denoted , is the fundamental physical constant characterizing the strength of the electromagnetic interaction. ...
A Svedberg (symbol S, sometimes Sv) is a non-SI physical unit used in ultracentrifugation. ...
The helek (Hebrew, meaning portion, plural halakim) is a unit of time used in the calculation of the Hebrew calendar. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
Metric time is the measure of time interval using the metric system, which defines the second as the base unit of time, and multiple and submultiple units formed with metric prefixes, such as kiloseconds and milliseconds. ...
Ke (åˆ») is a traditional decimal time unit equalling 14. ...
Ke (åˆ») is a traditional decimal time unit equalling 14. ...
The hour (symbol: h) is a unit of time. ...
Look up day in Wiktionary, the free dictionary. ...
For more details on each day of the week, see days of the week. ...
Look up fortnight in Wiktionary, the free dictionary. ...
Look up Month in Wiktionary, the free dictionary. ...
Look up Month in Wiktionary, the free dictionary. ...
Look up Month in Wiktionary, the free dictionary. ...
A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
A year (from Old English gÄ“r) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
The sidereal year is the time for the Sun to return to the same position in respect to the stars of the celestial sphere. ...
An Olympiad is a period of four years, associated with the Olympic Games of Classical Greece. ...
In astronomy, an octaeteris is the period of eight solar years after which the moon phase occurs on the same day of the year plus one or two days. ...
For other senses of this word, see decade (disambiguation). ...
The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate common multiple of the tropical year and the synodic month. ...
The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate common multiple of the year (specifically, the seasonal tropical year) and the synodic month. ...
Eclipses may occur repeatedly, separated by some specific interval of time: this interval is called an eclipse cycle. ...
A century (From the Latin cent, one hundred) is one hundred consecutive years. ...
A century (From the Latin cent, one hundred) is one hundred consecutive years. ...
Eclipses may occur repeatedly, separated by some specific interval of time: this interval is called an eclipse cycle. ...
A millennium (pl. ...
A millennium (pl. ...
A millennium (pl. ...
The Sothic cycle or Canicular period is a period of 1461 ancient Egyptian years (of 365 days) or 1460 Julian years (averaging 365. ...
### Speed or velocity A velocity consists of a speed combined with a direction; the speed part of the velocity takes units of speed. This article does not cite any references or sources. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The hour (symbol: h) is a unit of time. ...
â€¹ The template below (Unit of length) is being considered for deletion. ...
Look up fortnight in Wiktionary, the free dictionary. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the unit of time. ...
Kilometre per hour (American spelling: kilometer per hour) is a unit of both speed (scalar) and velocity (vector). ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the unit of time. ...
Miles per hour is a unit of speed, expressing the number of international miles covered per hour. ...
A knot is a unit of speed abbreviated kt or kn. ...
A nautical mile or sea mile is a unit of length. ...
A knot is a unit of speed abbreviated kt or kn. ...
â€œMilesâ€ redirects here. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
â€œMilesâ€ redirects here. ...
This article is about the unit of time. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
For other uses, see Speed of sound (disambiguation). ...
This article is about velocity in physics. ...
### Acceleration Acceleration is the time rate of change of velocity and/or direction, and at any point on a velocity-time graph, it is given by the slope of the tangent to the curve at that point. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
The metre (or meter) per second squared is the SI derived unit of acceleration. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The hour (symbol: h) is a unit of time. ...
This article is about the unit of time. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
This article is about the unit of time. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
This article is about the unit of time. ...
The galileo or gal is the CGS unit of acceleration. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the unit of time. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the unit of time. ...
â€œMilesâ€ redirects here. ...
The hour (symbol: h) is a unit of time. ...
This article is about the unit of time. ...
A knot is a unit of speed abbreviated kt or kn. ...
This article is about the unit of time. ...
Gravity is a force of attraction that acts between bodies that have mass. ...
â€œMilesâ€ redirects here. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
This article is about the unit of time. ...
â€œMilesâ€ redirects here. ...
This article is about the unit of time. ...
### Force Force Name of unit | Symbol | Definition | Relation to SI units | newton (SI unit) | N | ≡ kg·m/s² | = 1 N | atomic unit of force | au | ≡ m_{e}·α²·*c*²/a_{0} | ≈ 8.238 722 241×10^{−8} N | dyne (cgs unit) | dyn | ≡ g·cm/s² | = 10^{−5} N | milligrave-force, gravet-force | mGf; gf | ≡ *g* × 1 g | = 9.806 65 mN | poundal | pdl | ≡ 1 lb·ft/s² | = 0.138 254 954 376 N | ounce-force | ozf | ≡ *g* × 1 oz | = 0.278 013 850 953 781 2 N | pound-force | lbf | ≡ *g* × 1 lb | = 4.448 221 615 260 5 N | kilogram-force; kilopond; grave-force | kgf; kp; Gf | ≡ *g* × 1 kg | = 9.806 65 N | sthene (mts unit) | sn | ≡ 1 t·m/s² | = 1 ×10^{−3} N | kip; kip-force | kip; kipf; klbf | ≡ *g* × 1000 lb | = 4.448 221 615 260 5 ×10^{3} N | ton-force | tnf | ≡ *g* × 1 sh tn | = 8.896 443 230 521 ×10^{3} N | *See also:* Conversion between weight (force) and mass In physics, a net force acting on a body causes that body to accelerate; that is, to change its velocity. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
For other uses, see Newton (disambiguation). ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
The fine-structure constant or Sommerfeld fine-structure constant, usually denoted , is the fundamental physical constant characterizing the strength of the electromagnetic interaction. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central nucleus. ...
In physics, the dyne is a unit of force specified in the centimetre-gram-second (cgs) system of units, symbol dyn. One dyne is equal to exactly 10-5 newtons. ...
CGS is an acronym for centimetre-gram-second. ...
now. ...
g (also gee, g-force or g-load) is a non-SI unit of acceleration defined as exactly 9. ...
The poundal is a non-SI unit of force. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
The unit kilogram-force (kgf, often just kg) or kilopond (kp) is defined as the force exerted by one kilogram of mass in standard Earth gravity. ...
now. ...
The metre-tonne-second or mts system of units is a system of physical units introduced in the Soviet Union in 1933, but abolished in 1955. ...
In the United States, a kip is a unit of force that equals 1,000 pounds, i. ...
Look up ton in Wiktionary, the free dictionary. ...
For other uses, see Weight (disambiguation). ...
### Pressure or mechanical stress Pressure Name of unit | Symbol | Definition | Relation to SI units | atmosphere (standard) | atm | | ≡ 101 325 Pa ^{[8]} | atmosphere (technical) | at | ≡ 1 kgf/cm² | = 98.0665 ×10^{−3} Pa ^{[8]} | bar | bar | | ≡ 10^{5} Pa | barye (cgs unit) | | ≡ 1 dyn/cm² | = 0.1 Pa | centimetre of mercury | cmHg | ≡ 13 595.1 kg/m³ × 1 cm × *g* | ≈ 1.333 22 ×10^{−3} Pa ^{[8]} | centimetre of water (4 °C) | cmH_{2}O | ≈ 999.972 kg/m³ × 1 cm × *g* | ≈ 98.0638 Pa ^{[8]} | foot of mercury (conventional) | ftHg | ≡ 13 595.1 kg/m³ × 1 ft × *g* | ≈ 40.636 66 ×10^{−3} Pa ^{[8]} | foot of water (39.2 °F) | ftH_{2}O | ≈ 999.972 kg/m³ × 1 ft × *g* | ≈ 2.988 98 ×10^{−3} Pa ^{[8]} | inch of mercury (conventional) | inHg | ≡ 13 595.1 kg/m³ × 1 in × *g* | ≈ 3.386 389 ×10^{−3} Pa ^{[8]} | inch of water (39.2 °F) | inH_{2}O | ≈ 999.972 kg/m³ × 1 in × *g* | ≈ 249.082 Pa ^{[8]} | kilogram-force per square millimetre | kgf/mm² | ≡ 1 kgf/mm² | = 9.806 65 ×10^{−6} Pa ^{[8]} | kip per square inch | ksi | ≡ 1 kipf/sq in | ≈ 6.894757 ×10^{−6} Pa ^{[8]} | millimetre of mercury | mmHg | ≡ 13 595.1 kg/m³ × 1 mm × *g* ≈ 1 torr | ≈ 133.322 4 Pa ^{[8]} | millimetre of water (3.98 °C) | mmH_{2}O | ≈ 999.972 kg/m³ × 1 mm × *g* = 0.999972 kgf/m² | = 9.806 38 Pa | pascal (SI unit) | Pa | ≡ N/m² = kg/(m·s²) | = 1 Pa ^{[9]} | pièze (mts unit) | pz | ≡ 1000 kg/m·s² | = 1 ×10^{−3} Pa | pound per square foot | psf | ≡ 1 lbf/ft² | ≈ 47.880 25 Pa ^{[8]} | poundal per square foot | pdl/sq ft | ≡ 1 pdl/sq ft | ≈ 1.488 164 Pa ^{[8]} | pound per square inch | psi | ≡ 1 lbf/in² | ≈ 6.894 757 ×10^{−3} Pa ^{[8]} | short ton per square foot | | ≡ 1 sh tn × *g* / 1 sq ft | ≈ 95.760 518 ×10^{−3} Pa | torr | torr | ≡ 101 325/760 Pa | ≈ 133.322 4 Pa ^{[8]} | This article is about pressure in the physical sciences. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
Atmospheric pressure is the pressure at any given point in the Earths atmosphere. ...
Atmospheric pressure is the pressure at any given point in the Earths atmosphere. ...
The bar (symbol bar), decibar (symbol dbar) and the millibar (symbol mbar, also mb) are units of pressure. ...
CGS is an acronym for centimetre-gram-second. ...
Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...
In the United States, a kip is a unit of force that equals 1,000 pounds, i. ...
An inch (plural: inches; symbol or abbreviation: in or, sometimes, â€³ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
The torr (symbol: Torr) or millimeter of mercury (mmHg) is a non-SI unit of pressure. ...
One way of defining pressure is in terms of the height of a column of fluid that may be supported by that pressure; or the height of a column of fluid that exerts that pressure at its base. ...
Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...
For other uses, see Pascal. ...
The metre-tonne-second or mts system of units is a system of physical units introduced in the Soviet Union in 1933, but abolished in 1955. ...
Look up pound in Wiktionary, the free dictionary. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The poundal is a non-SI unit of force. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A pressure gauge reading in PSI (red scale) and kPa (black scale) The pound-force per square inch (symbol: lbf/inÂ²) is a non-SI unit of pressure based on avoirdupois units. ...
Look up ton in Wiktionary, the free dictionary. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The torr (symbol: Torr) or millimeter of mercury (mmHg) is a non-SI unit of pressure. ...
### Torque Torque Name of unit | Symbol | Definition | Relation to SI units | Newton metre (SI unit) | N·m | ≡ N × m = kg·m²/s² | = 1 N·m | foot-poundal | ft pdl | ≡ 1 lb·ft²/s² | = 4.214 011 009 380 48×10^{−2} N·m | inch-pound force | in lbf | ≡ *g* × 1 lb × 1 in | = 0.112 984 829 027 616 7 N·m | foot-pound force | ft lbf | ≡ *g* × 1 lb × 1 ft | = 1.355 817 948 331 400 4 N·m | For other senses of this word, see torque (disambiguation). ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
Newton metre is the unit of moment (torque) in the SI system. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The foot-pound force (symbol: ftÂ·lbf) is an English unit of work or energy from the English Engineering System. ...
### Energy Energy Name of unit | Symbol | Definition | Relation to SI units | joule (SI unit) | J | ≡ m·N = W·s = V·A·s = kg·m²/s² | = 1 J | electronvolt | eV | ≡ *e* × 1 V | ≈ 1.602 176×10^{−19} J | rydberg | Ry | ≡ *R*_{∞}·ℎ·*c* | ≈ 2.179 872×10^{−18} J | hartree | E_{h} | ≡ m_{e}·α²·*c*² (= 2 Ry) | ≈ 4.359 744×10^{−18} J | atomic unit of energy | au | ≡ E_{h} | ≈ 4.359 744×10^{−18} J | erg (cgs unit) | erg | ≡ 1 g·cm²/s² | = 10^{−7} J | foot-poundal | ft pdl | ≡ 1 lb·ft²/s² | = 4.214 011 009 380 48×10^{−2} J | cubic centimetre of atmosphere; standard cubic centimetre | cc atm; scc | ≡ 1 atm × 1 cm³ | = 0.101 325 J | inch-pound force | in lbf | ≡ *g* × 1 lb × 1 in | = 0.112 984 829 027 616 7 J | foot-pound force | ft lbf | ≡ *g* × 1 lb × 1 ft | = 1.355 817 948 331 400 4 J | calorie (20 °C) | cal_{20 °C} | | ≈ 4.1819 J | calorie (thermochemical) | cal_{th} | | ≡ 4.184 J | calorie (15 °C) | cal_{15 °C} | | ≡ 4.1855 J | calorie (International Table) | cal_{IT} | | ≡ 4.1868 J | calorie (mean) | cal_{mean} | | ≈ 4.190 02 J | calorie (3.98 °C) | cal_{3.98 °C} | | ≈ 4.2045 J | kilocalorie; large calorie | kcal; Cal | ≡ 1000 cal_{IT} | = 4.1868 ×10^{3} J | litre-atmosphere | l atm; sl | ≡ 1 atm × 1 L | = 101.325 J | gallon-atmosphere (US) | US gal atm | ≡ 1 atm × 1 gal (US) | = 383.556 849 013 8 J | gallon-atmosphere (imperial) | imp gal atm | ≡ 1 atm × 1 gal (imp) | = 460.632 569 25 J | British thermal unit (thermochemical) | BTU_{th} | | ≈ 1.054 350 ×10^{3} J | British thermal unit (ISO) | BTU_{ISO} | | ≡ 1.0545 ×10^{3} J | British thermal unit (63 °F) | BTU_{63 °F} | | ≈ 1.0546 ×10^{3} J | British thermal unit (60 °F) | BTU_{60 °F} | | ≈ 1.054 68 ×10^{3} J | British thermal unit (59 °F) | BTU_{59 °F} | | ≡ 1.054 804 ×10^{3} J | British thermal unit (International Table) | BTU_{IT} | | = 1.055 055 852 62 ×10^{3} J | British thermal unit (mean) | BTU_{mean} | | ≈ 1.055 87 ×10^{3} J | British thermal unit (39 °F) | BTU_{39 °F} | | ≈ 1.059 67 ×10^{3} J | Celsius heat unit (International Table) | CHU_{IT} | ≡ 1 BTU_{IT} × 1 K/°R | = 1.899 100 534 716 ×10^{3} J | cubic foot of atmosphere; standard cubic foot | cu ft atm; scf | ≡ 1 atm × 1 ft³ | = 2.869 204 480 934 4 ×10^{3} J | cubic yard of atmosphere; standard cubic yard | cu yd atm; scy | ≡ 1 atm × 1 yd³ | = 77.468 520 985 228 8 ×10^{3} J | cubic foot of natural gas | | ≡ 1000 BTU_{IT} | = 1.055 055 852 62 ×10^{6} J | horsepower-hour | hp·h | ≡ 1 hp × 1 h | = 2.684519537696172792 ×10^{6} J | kilowatt-hour; Board of Trade Unit | kW·h; B.O.T.U. | ≡ 1 kW × 1 h | = 3.6 ×10^{6} J | thermie | th | ≡ 1 Mcal_{IT} | = 4.1868 ×10^{6} J | therm (U.S.) | | ≡ 100 000 BTU_{59 °F} | = 105.4804 ×10^{6} J | therm (E.C.) | | ≡ 100 000 BTU_{IT} | = 105.505 585 262 ×10^{6} J | ton of TNT | tTNT | ≡ 1 Gcal_{th} | = 4.184 ×10^{9} J | barrel of oil equivalent | bboe | ≈ 5.8 MBTU_{59 °F} | ≈ 6.12 ×10^{9} J | ton of coal equivalent | TCE | ≡ 7 Gcal_{th} | = 29.3076 ×10^{9} J | ton of oil equivalent | TOE | ≡ 10 Gcal_{th} | = 41.868 ×10^{9} J | quad | | ≡ 10^{15} BTU_{IT} | = 1.055 055 852 62×10^{18} J | Look up si, Si, SI in Wiktionary, the free dictionary. ...
The joule (IPA: or ) (symbol: J) is the SI unit of energy. ...
An electronvolt (symbol: eV) is the amount of energy gained by a single unbound electron when it falls through an electrostatic potential difference of one volt. ...
The elementary charge (symbol e or sometimes q) is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron. ...
Johannes Rydberg, commonly known as Janne Rydberg, (November 8, 1854 - December 28, 1919), was a Swedish physicist mainly known for devising the Rydberg formula, which is used to predict the wavelengths of photons (of light and other electromagnetic radiation) emitted by changes in the energy level of an electron in...
The Rydberg constant, named after physicist Janne Rydberg, is a physical constant discovered when measuring the spectrum of hydrogen, and building upon results from Anders Jonas Ã…ngstrÃ¶m and Johann Balmer. ...
A commemoration plaque for Max Planck on his discovery of Plancks constant, in front of Humboldt University, Berlin. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
The Hartree energy (symbol Eh) is a physical constant used as atomic unit of energy, named after physicist Douglas Hartree. ...
The fine-structure constant or Sommerfeld fine-structure constant, usually denoted , is the fundamental physical constant characterizing the strength of the electromagnetic interaction. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
An erg is the unit of energy and mechanical work in the centimetre-gram-second (CGS) system of units, symbol erg. Its name is derived from the Greek word meaning work. The erg is a small unit, equal to a force of one dyne exerted for a distance of one...
CGS is an acronym for centimetre-gram-second. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
Standard atmosphere (symbol: atm) is a unit of pressure. ...
The foot-pound force (symbol: ftÂ·lbf) is an English unit of work or energy from the English Engineering System. ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
The litre or liter (see spelling differences) is a unit of volume. ...
Standard atmosphere (symbol: atm) is a unit of pressure. ...
The gallon (abbreviation: gal) is a unit of volume. ...
The gallon (abbreviation: gal) is a unit of volume. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
For other uses, see Celsius (disambiguation). ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about a unit of measurement. ...
The hour (symbol: h) is a unit of time. ...
The kilowatt-hour (symbol: kW·h) is a unit for measuring energy. ...
Look up ton in Wiktionary, the free dictionary. ...
R-phrases S-phrases Related Compounds Related compounds picric acid hexanitrobenzene Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox disclaimer and references Trinitrotoluene (TNT) is a chemical compound with the formula C6H2(NO2)3CH3. ...
The barrel of oil equivalent (bboe, sometimes BOE) is a unit of energy based on the approximate energy released by burning one barrel of crude oil. ...
The ton of oil equivalent (TOE) is a unit for measuring energy. ...
A typical chart using quads. ...
### Power Power Name of unit | Symbol | Definition | Relation to SI units | watt (SI unit) | W | ≡ J/s = N·m/s = = kg·m²/s³ | = 1 W | lusec | lusec | ≡ 1 L·µmHg/s ^{[10]} | ≈ 1.333×10^{−4} W | foot-pound-force per hour | ft lbf/h | ≡ 1 ft lbf/h | ≈ 3.766 161×10^{−4} W | atmosphere cubic centimetre per minute | atm ccm | ≡ 1 atm × 1 cm³/min | = 1.688 75×10^{−3} W | foot-pound-force per minute | ft lbf/min | ≡ 1 ft lbf/min | = 2.259 696 580 552 334×10^{−2} W | atmosphere–cubic centimetre per second | atm ccs | ≡ 1 atm × 1 cm³/s | = 0.101 325 W | BTU (International Table) per hour | BTU_{IT}/h | ≡ 1 BTU_{IT}/h | ≈ 0.293 071 W | atmosphere–cubic foot per hour | atm cfh | ≡ 1 atm × 1 cu ft/h | = 0.797 001 244 704 W | foot-pound-force per second | ft lbf/s | ≡ 1 ft lbf/s | = 1.355 817 948 331 400 4 W | litre-atmosphere per minute | L·atm/min | ≡ 1 atm × 1 L/min | = 1.688 75 W | calorie (International Table) per second | cal_{IT}/s | ≡ 1 cal_{IT}/s | = 4.1868 W | BTU (International Table) per minute | BTU_{IT}/min | ≡ 1 BTU_{IT}/min | ≈ 17.584 264 W | atmosphere-cubic foot per minute | atm·cfm | ≡ 1 atm × 1 cu ft/min | = 47.820 074 682 24 W | square foot equivalent direct radiation | sq ft EDR | ≡ 240 BTU_{IT}/h | ≈ 70.337 057 W | litre-atmosphere per second | L·atm/s | ≡ 1 atm × 1 L/s | = 101.325 W | horsepower (metric) | hp | ≡ 75 m kgf/s | = 735.498 75 W | horsepower (European electrical) | hp | ≡ 75 kp·m/s | = 736 W | horsepower (Imperial mechanical) | hp | ≡ 550 ft lbf/s | = 745.699 871 582 270 22 W | horsepower (Imperial electrical) | hp | | ≡ 746 W | ton of air conditioning | | ≡ 1 t × 1005 J/kg × 1 °R/K ÷ 10 min | ≈ 844.2 W | poncelet | p | ≡ 100 m kgf/s | = 980.665 W | BTU (International Table) per second | BTU_{IT}/s | ≡ 1 BTU_{IT}/s | = 1.055 055 852 62×10^{3} W | atmosphere-cubic foot per second | atm cfs | ≡ 1 atm × 1 cu ft/s | = 2.869 204 480 934 4×10^{3} W | ton of refrigeration (IT) | | ≡ 1 BTU_{IT} × 1 sh tn/lb ÷ 10 min/s | ≈ 3.516 853×10^{3} W | ton of refrigeration (Imperial) | | ≡ 1 BTU_{IT} × 1 lng tn/lb ÷ 10 min/s | ≈ 3.938 875×10^{3} W | boiler horsepower | bhp | ≈ 34.5 lb/h × 970.3 BTU_{IT}/lb | ≈ 9.810 657×10^{3} W | In physics, power (symbol: P) is the rate at which work is performed or energy is transmitted, or the amount of energy required or expended for a given unit of time. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
For other uses, see Watt (disambiguation). ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
The hour (symbol: h) is a unit of time. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
This article is about the unit of time. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
The hour (symbol: h) is a unit of time. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The hour (symbol: h) is a unit of time. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
This article is about the unit of time. ...
The litre or liter (see spelling differences) is a unit of volume. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
Etymology: French calorie, from Latin calor (heat), from calere (to be warm). ...
This article is about the unit of time. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about a unit of measurement. ...
This article is about a unit of measurement. ...
This article is about a unit of measurement. ...
This article is about a unit of measurement. ...
Look up ton in Wiktionary, the free dictionary. ...
Poncelet may refer to: Christian Poncelet, the politician; Jean-Victor Poncelet, the mathematician. ...
The British thermal unit (BTU) is a non-metric unit of energy, used in the United States and, to a certain extent, the UK. The SI unit is the joule (J), which is used by most other countries. ...
This article is about the unit of time. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the unit of time. ...
Look up ton in Wiktionary, the free dictionary. ...
Look up ton in Wiktionary, the free dictionary. ...
This article is about a unit of measurement. ...
### Angular momentum Action, Angular momentum Name of unit | Symbol | Definition | Relation to SI units | SI unit | J·s | ≡ kg·m²/s | = 1 J·s | atomic unit of action | au | ≡ ℏ = ℎ/2π | ≈ 1.054 571 596×10^{−34} J·s | cgs unit | erg·s | | = 10^{−7} J·s | Look up si, Si, SI in Wiktionary, the free dictionary. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
Plancks constant, denoted h, is a physical constant that is used to describe the sizes of quanta. ...
A commemoration plaque for Max Planck on his discovery of Plancks constant, in front of Humboldt University, Berlin. ...
When a circles diameter is 1, its circumference is Ï€. Pi or Ï€ is the ratio of a circles circumference to its diameter in Euclidean geometry, approximately 3. ...
CGS is an acronym for centimetre-gram-second. ...
### Electric current This box: Electric current is the flow (movement) of electric charge. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
For other uses, see Ampere (disambiguation). ...
The SI system of units defines seven SI base units: physical units defined by an operational definition. ...
CGS is an acronym for centimetre-gram-second. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
CGS is an acronym for centimetre-gram-second. ...
CGS is an acronym for centimetre-gram-second. ...
### Electric charge This box: Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
The coulomb (symbol: C) is the SI unit of electric charge. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
The elementary charge (symbol e or sometimes q) is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron. ...
The statcoulomb (statC) or franklin (Fr) or electrostatic unit of charge (esu) is the physical unit for electrical charge used in the centimetre-gram-second (cgs) electrostatic system of units. ...
The statcoulomb (statC) or franklin (Fr) or electrostatic unit of charge (esu) is the physical unit for electrical charge used in the cgs electrostatic system of units. ...
CGS is an acronym for centimetre-gram-second. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
The abcoulomb (abC) or electromagnetic unit of charge (emu) is the physical unit for electrical charge used in the cgs electromagnetic system of units. ...
CGS is an acronym for centimetre-gram-second. ...
In physics, the faraday (not to be confused with the farad) is a unit of electrical charge; one faraday is equal to the charge of 6. ...
Avogadros number, also called Avogadros constant (NA), named after Amedeo Avogadro, is formally defined to be the number of carbon-12 atoms in 12 grams (0. ...
The elementary charge (symbol e or sometimes q) is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron. ...
### Electromotive force Voltage, Electromotive force Name of unit | Symbol | Definition | Relation to SI units | volt (SI unit) | V | ≡ kg·m²/(A·s³) | = 1 V | abvolt (cgs unit) | abV | | ≡ 1×10^{−8} V | statvolt (cgs unit) | statV | ≡ *c*· (1 μJ/A·m) | = 299.792 458 V | International safety symbol Caution, risk of electric shock (ISO 3864), colloquially known as high voltage symbol. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
Josephson junction array chip developed by NIST as a standard volt. ...
CGS is an acronym for centimetre-gram-second. ...
The statvolt is the unit of voltage and electrical potential used in the cgs system of units. ...
CGS is an acronym for centimetre-gram-second. ...
The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning swiftness.[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. ...
### Electrical resistance Electrical resistance is a measure of the degree to which an electrical component opposes the passage of current. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
The ohm (symbol: Î©) is the SI unit of electric resistance. ...
### Dynamic viscosity For other uses, see Viscosity (disambiguation). ...
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The pascal second (symbol PaÂ·s) is the SI unit of dynamic viscosity. ...
The poise (P; IPA: ) is the unit of dynamic viscosity in the centimetre gram second system of units. ...
CGS is an acronym for centimetre-gram-second. ...
### Kinematic viscosity For other uses, see Viscosity (disambiguation). ...
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The stokes is the cgs physical unit for kinematic viscosity. ...
CGS is an acronym for centimetre-gram-second. ...
### Information entropy Information entropy, Name of unit | Symbol | Definition | Relation to SI units | SI unit | J/K | ≡ J/K | = 1 J/K | nat; nip; nepit | nat | ≡ *k*_{B} | = 1.3806505(23) × 10^{−23} J/K | bit; shannon | bit; b; Sh | ≡ ln(2) × *k*_{B} | = 9.569940(16) × 10^{−24} J/K | ban; hartley | ban; Hart | ≡ ln(10) × *k*_{B} | = 3.1790653(53) × 10^{−23} J/K | nibble | | ≡ 4 bits | = 3.8279760(64) × 10^{−23} J/K | byte | B | ≡ 8 bits | = 7.655952(13) × 10^{−23} J/K | kilobyte (decimal) | kB | ≡ 1000 B | = 7.655952(13) × 10^{−20} J/K | kilobyte (kibibyte) | KB; KiB | ≡ 1024 B | = 7.839695(13) × 10^{−20} J/K | Claude Shannon In information theory, the Shannon entropy or information entropy is a measure of the uncertainty associated with a random variable. ...
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A nat (sometimes also nit or even nepit) is a logarithmic unit of information or entropy, based on natural logarithms and powers of e, rather than the powers of 2 and base 2 logarithms which define the bit. ...
This article is about the unit of information. ...
A ban, sometimes called a hartley, is a logarithmic unit which measures information or entropy, based on base 10 logarithms and powers of 10, rather than the powers of 2 and base 2 logarithms which define the bit. ...
For other uses, see Nibble (disambiguation). ...
For the computer industry magazine, see Byte (magazine). ...
A kilobyte (derived from the SI prefix kilo-, meaning 1,000) is a unit of information or computer storage equal to either 1,000 bytes or 1,024 bytes (210), depending on context. ...
A kilobyte (derived from the SI prefix kilo-, meaning 1,000) is a unit of information or computer storage equal to either 1,000 bytes or 1,024 bytes (210), depending on context. ...
A kibibyte (a contraction of kilo binary byte) is a unit of information or computer storage, commonly abbreviated KiB (never kiB). 1 kibibyte = 210 bytes = 1,024 bytes The kibibyte is closely related to the kilobyte, which can be used either as a synonym for kibibyte or to refer to...
### Temperature *Note: see Temperature conversion for more detail* // Ranking to Celsius do not match equations from Celsius table. ...
For other uses, see Temperature (disambiguation). ...
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For other uses, see Kelvin (disambiguation). ...
The SI system of units defines seven SI base units: physical units defined by an operational definition. ...
For other uses, see Celsius (disambiguation). ...
For the idealized thermodynamic cycle for a steam engine, see Rankine cycle. ...
For other uses, see Fahrenheit (disambiguation). ...
## Software tools Home and office computers come with converters in bundled spreadsheet applications or can access free converters via the Internet. Units and measurements can be easily converted using these tools, but only if the units are explicitly defined and the conversion is compatible (e.g., cmHg to kPa).
### Free conversion software units is a Unix computer program for conversion of units of quantities. ...
### General commercial sources of converters - Advanced electronic calculators have unit-conversion functionality.
- Spreadsheet programs usually provide conversion functions or formulas or the user can write their own.
- Commercial mathematical, scientific and technical applications often include converters.
For other uses, see Calculator (disambiguation). ...
Screenshot of a spreadsheet under OpenOffice A spreadsheet is a rectangular table (or grid) of information, often financial information. ...
In computer science, a subroutine (function, procedure, or subprogram) is a sequence of code which performs a specific task, as part of a larger program, and is grouped as one, or more, statement blocks; such code is sometimes collected into software libraries. ...
In mathematics and in the sciences, a formula (plural: formulae, formulÃ¦ or formulas) is a concise way of expressing information symbolically (as in a mathematical or chemical formula), or a general relationship between quantities. ...
## References **^** "NIST Reference on Constants, Units, and Uncertainty."(2006). National Institute of Standards and Technology. Accessed 22 February 2008. - ^
^{a} ^{b} National Bureau of Standards. (June 30, 1959). *Refinement of values for the yard and the pound*. Federal Register, viewed September 20, 2006 at National Geodetic Survey web site. **^** *International System of Units,* 8th ed. (2006), Bureau International des Poids et Mesures, Section 4.1 Table 8. **^** P. Kenneth Seidelmann, Ed. (1992). *Explanatory Supplement to the Astronomical Almanac.* Sausalito, CA: University Science Books. p. 716 and s.v. parsec in Glossary. **^** Barry N. Taylor, Ed.,*NIST Special Publication 330: The International System of Units (SI)* (2001 Edition), Washington: U.S. Government Printing Office, 43,"The 12th Conference Generale des Poids et Mesures (CGPM)…declares that the word “liter” may be employed as a special name for the cubic decimeter". **^** The Swiss Federal Office for Metrology gives *Zentner* on a German language web page[1] and *quintal* on the English translation of that page[2]; the unit is marked "spécifiquement suisse !" **^** Rowlett, Russ. *A Dictionary of Units of Measurement*. Viewed October 14, 2006 at http://www.unc.edu/~rowlett/units/dictZ.html - ^
^{a} ^{b} ^{c} ^{d} ^{e} ^{f} ^{g} ^{h} ^{i} ^{j} ^{k} ^{l} ^{m} ^{n} ^{o} Barry N. Taylor, (April 1995), *Guide for the Use of the International System of Units (SI)* (NIST Special Publication 811), Washington, DC: U.S. Government Printing Office, pp. 64–65. **^** Barry N. Taylor, (April 1995), *Guide for the Use of the International System of Units (SI)* (NIST Special Publication 811), Washington, DC: U.S. Government Printing Office, p. 5. **^** Russ Rowlett. (2005). *How Many: A Dictionary of Units of Measure*. Viewed 5 November 2006 at http://www.unc.edu/~rowlett/units/ - Klein, Herbert. 1988.
*The science of measurement: A historical survey*. New York: Dover Publications. NIST logo The National Institute of Standards and Technology (NIST, formerly known as The National Bureau of Standards) is a non-regulatory agency of the United States Department of Commerceâ€™s Technology Administration. ...
The Bureau International des Poids et Mesures (International Bureau of Weights and Measures, or BIPM) is a standards organization, one of the three organizations established to maintain the SI system under the terms of the Metre Convention. ...
is the 287th day of the year (288th in leap years) in the Gregorian calendar. ...
is the 309th day of the year (310th in leap years) in the Gregorian calendar. ...
## See also Wikibooks' [[wikibooks:|]] has more about this subject: **FHSST Physics Units:How to Change Units** Image File history File links Wikibooks-logo-en. ...
Many, if not most, parameters and measurements in the physical sciences and engineering are expressed as a numerical quantity and a corresponding dimensional unit; for example: 1000 kg/mÂ³, 100 kPa/bar, 50 miles per hour, 1000 Btu/lb. ...
This article or section does not cite its references or sources. ...
â€œAccuracyâ€ redirects here. ...
Rounding to n significant figures is a form of rounding. ...
Approximate conversion of units often needs to be done without calculator or computer. ...
// Comparison of temperature scales Â¹ Normal human body temperature is 36. ...
Look up si, Si, SI in Wiktionary, the free dictionary. ...
English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. ...
This article is about post-1824 imperial units, see also English unit, U.S. customary units or Avoirdupois. ...
The U.S. customary units (more commonly known in the US as English units or standard units) are the non-metric units of measurement that are presently used in the United States, in some cases alongside the metric system of units. ...
Systems of measurement | Metric systems | International System of Units **·** centimetre-gram-second **·** metre-tonne-second **·** Gravitational units A system of measurement is a set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce. ...
The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ...
â€œSIâ€ redirects here. ...
This article or section is in need of attention from an expert on the subject. ...
The metre-tonne-second or mts system of units is a system of physical units introduced in the Soviet Union in 1933, but abolished in 1955. ...
The unit kilogram-force (kgf, often just kg) or kilopond (kp) is defined as the force exerted by one kilogram of mass in standard Earth gravity. ...
| Natural units | Geometric systems **·** Planck **·** Stoney **·** "Schrödinger" **·** Atomic **·** Electronic **·** Quantum electrodynamical In physics, natural units are physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants take on the numerical value of one when expressed in terms of a particular set of natural units. ...
In physics, especially in the general theory of relativity, geometrized units or geometric units constitute a physical unit system in which all physical quantities are identified with geometric quantities such as areas, lengths, dimensionless numbers, path curvatures, or sectional curvatures. ...
In physics, Planck units are one of several systems of natural units, units of measurement that normalize certain fundamental physical constants to 1. ...
In physics, natural units are physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants take on the numerical value of one when expressed in terms of a particular set of natural units. ...
In physics, natural units are physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants take on the numerical value of one when expressed in terms of a particular set of natural units. ...
Atomic units (au) form a system of units convenient for electromagnetism, atomic physics, and quantum electrodynamics, especially when the focus is on the properties of electrons. ...
In physics, natural units are physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants take on the numerical value of one when expressed in terms of a particular set of natural units. ...
In physics, natural units are physical units of measurement defined in terms of universal physical constants in such a manner that some chosen physical constants take on the numerical value of one when expressed in terms of a particular set of natural units. ...
| Customary systems | Avoirdupois **·** Troy **·** Apothecaries' **·** English **·** Imperial **·** Canadian **·** US customary **·** Danish **·** Dutch **·** Finnish **·** French **·** German **·** Maltese **·** Norwegian **·** Scottish **·** Spanish/Portuguese **·** Swedish **·** Polish **·** Romanian **·** Russian **·** Tatar **·** Hindu **·** Pegu **·** Chinese **·** Japanese **·** Taiwanese The avoirdupois (IPA: ; French IPA: ) system is a system of weights (or, properly, mass) based on a pound of sixteen ounces. ...
Troy ounce is a traditional unit of gold weight. ...
The apothecaries system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. ...
English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. ...
This article is about post-1824 imperial units, see also English unit, U.S. customary units or Avoirdupois. ...
U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units â€” the modern metric system). ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
Several native system of weights and measures were used in Scotland. ...
There are a number of Spanish and Portuguese units of measurement of length or area that are now obsolete. ...
Ancient Polish weights and measures included: Garniec [1] Grzywna [2] and [3] KamieÅ„ [4] Korzec [5] Krok [6] Kwarta [7] Kwartnik [8] Åan [9] Åaszt [10] Åawka [11] ÅokieÄ‡ [12] Åut [13] Morga [14] Pacierz [15] PiÄ™dÅº [16] Skojec [17] Staje [18] Stopa [19] Wiardunek [20] ZdrowaÅ›ka [21...
Obsolete Russian weights and measures were used in Imperial Russia and after the Russian Revolution until they were replaced in the Soviet Union by a metric system in 1924. ...
Obsolete Tatar weights and measures were used by Tatars until 1924, when they were replaced in the Soviet Union by the SI units. ...
Old Indian measures are still in use today, primarily for religious purposes in Hinduism and Jainism. ...
This article or section does not cite any references or sources. ...
Taiwanese units of measurement (Traditional Chinese: ; pinyin: ; Minnan: TÃ¢ichoÃ¨) are the customary and traditional units of measure used in Taiwan. ...
| Ancient systems | Greek **·** Roman **·** Egyptian **·** Hebrew **·** Arabic **·** Mesopotamian **·** Persian **·** Harappan Ancient Greek weights and measures - Wikipedia, the free encyclopedia /**/ @import /skins-1. ...
The Roman system of measurement was built on the Greek system with Egyptian influences. ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
Weight Reduced to English troy-weight, the Hebrew weights were: Gerah (Lev. ...
The Arabic system of measurement is based on the Persian system. ...
Originally Ancient Mesopotamian weights and measures came from a collection of city states loosely organized by family, tribe and occupation. ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
This article does not cite its references or sources. ...
| Other systems | Non-standard **·** Mesures usuelles Unusual units of measurement are sometimes used by scientists, especially physicists and mathematicians, and other technically-minded people such as engineers and programmers, as bits of dry humor combined with putative practical convenience. ...
Mesures usuelles (French for customary measurements) were a system of measurement introduced to act as compromise between metric system and traditional measurements. ...
| ## External links |