FACTOID # 25: If you're tired of sitting in traffic on your way to work, move to North Dakota.

 Home Encyclopedia Statistics States A-Z Flags Maps FAQ About

 WHAT'S NEW

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

(* = Graphable)

Encyclopedia > Troy 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. ...

## 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 14712 1559 7000 ~454 ~920
Troy 144175 1 1615 6475 56 ~34 1329175 12 1245 5760 ~373 ~38
Tower 2735 1516 1 45 34 ~710 121235 1114 12 5400 ~350 ~720
Merchant 2728 7564 54 1 1516 ~78 1537 14116 15 6750 ~437 ~716
London 3635 65 43 1615 1 ~1415 161635 15 16 7200 ~467 ~715
Metric ~1110 ~43 ~107 ~87 ~1514 1 ~1735 ~16 ~1717 ~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 â€“ 6 July 1189) ruled as King of England (1154â€“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. ...

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. ...

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 »

Share your thoughts, questions and commentary here