What is the difference between troy ounce and avoirdupois ounce?
An avoirdupois ounce weighs 28.3495 grams, while a troy ounce weighs 31.1035 grams. It’s believed that this is a throwback to the historic importance of precious metals in trade markets, and merchants’ need to have a standard unit of weight for gold, silver, gemstones and the like.
What is an AVDP oz?
Copper bullion coins like the Morgan design are weighted in avoirdupois (AVDP) ounces, a French term meaning “goods of weight” and a common unit of measure in the precious metals market. Precious metals like gold and silver are measured in troy ounces. One AVDP pound equals 16 AVDP ounces.
How many troy pounds is an avoirdupois pound?
The troy pound was adopted by the U.S. Mint for the regulation of coinage in 1828. The troy pound is equal to the apothecaries’ pound and to approximately 0.82 avoirdupois pound and 0.373 kilogram.
What is avoirdupois weight used for?
The avoirdupois pound contains 7,000 grains, or 256 drams of 27.344 grains each, or 16 ounces of 437 1/2 grains each. It is used for all products not subject to apothecaries’ weight (for pharmaceutical items) or troy weight (for precious metals). It is equal to about 1.22 apothecaries’ or troy pounds.
What does avoirdupois mean in French?
The word avoirdupois is from Anglo-Norman French aveir de peis (later avoir du pois), literally “goods of weight” (Old French aveir, as verb meaning “to have” and as noun meaning “property, goods”, comes from the Latin habere, “to have, to hold, to possess something”; de = “from”/”of”, cf.
What does Advp mean on a coin?
avoirdupois
Coins like the buffalo copper coin are weighted in avoirdupois (AVDP) ounces, a French term meaning “goods of weight” and a common unit of measure in the precious metals market.
Why is a troy ounce more than an ounce?
The troy system uses pounds and ounces, so it is similar, but there is one big difference; there an avoirdupois ounce equals 28.35 grams, whereas a troy ounce weighs 31.10 grams. This means one troy ounce is equivalent to approximately 1.09714 avoirdupois ounces.
Is avoirdupois a English word?
When “avoirdupois” first appeared in English in the 15th century, it carried a meaning of “goods sold by weight,” which is also the meaning of its Middle English predecessor, “avoir de pois.” That term derives from an Anglo-French phrase meaning “goods of weight.” Today, “avoirdupois” most commonly refers to the system …
What’s the difference between troy weight and regular weight?
The troy grain is equal to the grain unit of the avoirdupois system, but the troy ounce is heavier than the avoirdupois ounce, and the troy pound is lighter than the avoirdupois pound. One troy ounce (oz t) equals exactly 31.1034768 grams.