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Encyclopedia > Troy weight
Troy ounce is a traditional unit of gold weight.
Troy ounce is a traditional unit of gold weight.

Troy weight is a system of units of mass customarily used for precious metals, black powder, and gemstones. GOLD refers to one of the following: GOLD (IEEE) is an IEEE program designed to garner more student members at the university level (Graduates of the Last Decade). ... The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... For other uses, see Mass (disambiguation). ... For the CSI episode of the same name, see Precious Metal (CSI episode). ... Black powder was the original gunpowder and practically the only known propellant and explosive until the middle of the 19th century. ... For other uses, see Gemstone (disambiguation). ...


Named after Troyes, France, the troy system of weights was known to exist in medieval times. It was not until 1758 that it was established as the standard unit from which other weights derived.[dubious ] One cubic inch of distilled water, at 62°F, and at a barometric pressure of 30 inches of mercury, was determined to weigh 252.458 troy grains (gr).[1] City flag City coat of arms A street in Troyes. ... A cubic inch is the volume of a cube which is one inch long on each edge. ... For other uses, see Fahrenheit (disambiguation). ... Atmospheric pressure is the pressure caused by the weight of air above any area in the Earths atmosphere. ... Pressure is the application of force to a surface, and the concentration of that force in a given area. ... A grain is a unit of mass equal to 0. ...

Contents

Troy ounce

The troy ounce (ozt) is 480 grains, somewhat heavier than an avoirdupois ounce (437.5 grains).[2] A grain is exactly 64.79891 mg; hence one troy ounce is exactly 31.1034768 g, about 10 percent more than the avoirdupois ounce, which is exactly 28.349523125 g. The troy ounce is the only ounce used in the pricing of precious metals, gold, platinum, and silver. The grain, which is identical in both the troy and avoirdupois systems, is used to measure arrow and arrowhead weights in archery and bullets and powder weights in ballistics. Grains were long used in medicine but have been largely replaced by milligrams. The avoirdupois (IPA: ; French IPA: ) system is a system of weights (or, properly, mass) based on a pound of sixteen ounces. ... The milligram (symbol mg) is an SI unit of mass. ... BIC pen cap, about 1 gram. ... GOLD refers to one of the following: GOLD (IEEE) is an IEEE program designed to garner more student members at the university level (Graduates of the Last Decade). ... General Name, Symbol, Number platinum, Pt, 78 Chemical series transition metals Group, Period, Block 10, 6, d Appearance grayish white Standard atomic weight 195. ... This article is about the chemical element. ...


Troy pound

The troy pound (troy) is 5,760 gr (~373.24 g, 12 ozt), while an avoirdupois pound is 7,000 gr (~453.59 g).


There are 12 troy ounces per troy pound,[2] rather than 16 avoirdupois ounces (oz) in the avoirdupois pound (lb) as in the more common avoirdupois system. The avoirdupois pound is 14712 (~14.583) troy ounces, since troy ounces are larger than avoirdupois ounces. This article is about Ounce (unit of mass). ... Officially the pound is the name for at least three different units of mass: The pound (avoirdupois). ...


In Scotland the Incorporation of Goldsmiths of the City of Edinburgh used a system in multiples of sixteen. (See Assay-Master's Accounts, 1681-1702, on loan from the Incorporation to the National Archives of Scotland.) Thus there were 16 drops to the troy ounce, 16 (FIXME: ounces) to the troy pound, and 16 pounds to the troy stone. The Scots had several other ways of measuring precious metals and gems, but this was the common usage for silver and gold.


Conversions

Unit Grains Grams
Troy Pound (12 Troy ounces) 5,760 373.241 721 6
Troy Ounce (20 pennyweights) 480 31.103 476 8
Pennyweight 24 1.555 173 84
Grain 1 0.064 798 91
English pounds
Unit Pounds Ounces Grains Metric
avdp. troy tower merc. lond. metric avdp. troy tower g kg
Avoirdupois 1 175144 3527 2827 3536 ~1011 16 14+712 15+59 7000 ~454 ~920
Troy 144175 1 1615 6475 56 ~34 13+29175 12 12+45 5760 ~373 ~38
Tower 2735 1516 1 45 34 ~710 12+1235 11+14 12 5400 ~350 ~720
Merchant 2728 7564 54 1 1516 ~78 15+37 14+116 15 6750 ~437 ~716
London 3635 65 43 1615 1 ~1415 16+1635 15 16 7200 ~467 ~715
Metric ~1110 ~43 ~107 ~87 ~1514 1 ~17+35 ~16 ~17+17 ~7716 500 12

The troy system was used in the Apothecaries' system, but with different further subdivisions. The apothecaries system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. ...


Relationship to British coinage

The troy system was the basis for the pre-decimalisation British system of coinage introduced by Henry II of England, in which the penny was literally one pennyweight of silver. One pound sterling was equal to twenty shillings, with each shilling equal to twelve pennies. Thus, one pound sterling equals 240 pennyweights, or one troy pound of sterling silver. This article concerns British coinage, the coinage of the United Kingdom. ... Henry II of England (5 March 1133 – 6 July 1189) ruled as King of England (1154–1189), Count of Anjou, Duke of Normandy, Duke of Aquitaine, Duke of Gascony, Count of Nantes, Lord of Ireland and, at various times, controlled parts of Wales, Scotland and western France. ... For the NBA basketball player with the nickname see Penny Hardaway A variety of low value coins, including an Irish 2p piece and many U.S. pennies. ... 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. ... GBP redirects here. ... This article is about coinage. ... For the NBA basketball player with the nickname see Penny Hardaway A variety of low value coins, including an Irish 2p piece and many U.S. pennies. ...


See also

The carat is a unit of mass used for measuring gems and pearls, and is exactly 200 milligrams. ... Conversion of units refers to conversion factors between different units of measurement for the same quantity. ... The mark was originally a unit of weight for gold and silver common throughout western Europe, and was equal to 8 troy ounces. ...

References

  1. ^ Wightman, S.; Blanchard, William (1840). Wightman's Arithmetical Tables. Westminster: S. Wightman. OCLC 43196919. 
  2. ^ a b Troy Ounce. WordNet 3.0, Dictionary.com. Princeton University. Retrieved on 2008-01-10.

The Online Computer Library Center (OCLC) was founded in 1967 and originally named the Ohio College Library Center. ... 2008 (MMVIII) is the current year, a leap year that started on Tuesday of the Anno Domini (or common era), in accordance to the Gregorian calendar. ... is the 10th day of the year in the Gregorian calendar. ...

External links

  • Information on Gold weights and measures
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. ... “SI” 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. ... 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 physical units of measurement defined exclusively in terms of the five universal physical constants shown in the table below in such a manner that all of these physical constants take on the numerical value of one when expressed in terms of these 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. ... 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. ... The avoirdupois (IPA: ; French IPA: ) system is a system of weights (or, properly, mass) based on a pound of sixteen ounces. ... 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 — the modern metric system). ... This article needs to be cleaned up to conform to a higher standard of quality. ... The Dutch system was not standardised until Napoleon introduced the metric system. ... In Finland, approximate units of measure were derived from natural actions or objects such body parts, later standardised for the purpose of commerce. ... In France, before the decimalised metric system of 1799, a well-defined old system existed, however with some local variants. ... Germany had an indigenous system of German units of measurement prior to its adoption of the international metric system. ... In modern usage, metric is used almost exclusively in commercial transactions. ... As in the case of the Danes the Norwegians earliest standards of measure can be derived from their ship burials. ... 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. ... In Sweden, a common system for weights and measures was introduced by law in 1665. ... Ancient Polish weights and measures included: Garniec [1] Grzywna [2] and [3] Kamień [4] Korzec [5] Krok [6] Kwarta [7] Kwartnik [8] Łan [9] Łaszt [10] Ławka [11] Łokieć [12] Łut [13] Morga [14] Pacierz [15] Piędź [16] Skojec [17] Staje [18] Stopa [19] Wiardunek [20] Zdrowaśka [21... The measures of the old Romanian system varied greatly not only between the three Romanian states (Wallachia, Moldavia, Transylvania), but sometimes also inside the same country. ... 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. ... The Chinese units (Chinese: 市制; Hanyu Pinyin: ; literally market system) are the customary and traditional units of measure used in China. ... Shakkan-hō ) is the traditional Japanese system of measurement. ... Taiwanese units of measurement (Traditional Chinese: ; pinyin: ; Minnan: Tâichoè) are the customary and traditional units of measure used in Taiwan. ... 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. ... 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. ...

  Results from FactBites:
 
TROY - Definition (220 words)
The troy ounce is supposed to have been brought from Cairo during the crusades.
Troy weight when divided, the pound into 12 ounces, the ounce into 8 drams, the dram into 3 scruples, and the scruple into 20 grains, is called apothecaries' weight, used in weighing medicines, etc.
In the standard weights of the United States, the troy ounce is divided decimally down to the 1/10000 part.
NationMaster - Encyclopedia: Troy ounce (436 words)
The troy ounce is the only ounce used in the pricing of precious metals, such as gold and silver, and this is the only remaining use of the troy ounce.
In troy weight, there are 12 ounces in a pound, rather than 16 in the more-common avoirdupois system.
It would be for their convenience, then, to suppress the pound and ounce troy, and the drachm and quarter avoirdupois; and to form into one series the avoirdupois pound and ounce, and the troy pennyweight and grain.
  More results at FactBites »

 
 

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