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Troy weight is a system of units of mass that originated in the Kingdom of England in the 15th century [1] and is primarily used in the precious metals industry. The troy weight units are the grain, the pennyweight (24 grains), the troy ounce (20 pennyweights), and the troy pound (12 troy ounces).
This online conversion calculator will convert among different troy units of weight or mass. For broader calculations use the weight conversion calculator and more specific to avoirdupois, the U.S. standard system units, use avoirdupois unit conversions.
Troy weight, traditional system of weight in the British Isles based on the grain, pennyweight (24 grains), ounce (20 pennyweights), and pound (12 ounces). The troy grain, pennyweight, and ounce have been used since the Middle Ages to weigh gold, silver, and other precious metals and stones.
Learn about the Troy Oz weight, and how it is used in the precious metals world to weigh gold, silver, and platinum.
A troy ounce is a unit of measurement for precious metal weight that dates to the Middle Ages. One troy ounce is equal to 31.10 grams.
Troy weight is a system of units of mass that originated in 15th-century Kingdom of England and is primarily used in the precious metals industry. The troy weight units are the grain , the pennyweight (24 grains), the troy ounce (20 pennyweights), and the troy pound (12 troy ounces).
Troy weights are also called Apothecary weights, due to their use with medical drugs. Here are the basic specification comparisons between Troy and Avoirdupois weights: Troy Ounces > Avoirdupois Ounces. 1 Troy Ounce = 31.1035 grams; 1 Avoirdupois Ounce = 28.3495 grams; In other words, a 1 ounce silver coin is heavier than an ounce of tea.
The troy ounce measures the weight of most precious metals, including gold, silver, and platinum; they are also priced by the troy ounce. A single troy ounce equals 31.1034768 grams, OR about 10% more than one avoirdupois ounce, which is 28.349 grams.
In fact, a Troy ounce is approximately 10% heavier. A Troy ounce is defined as exactly 31.1034768 grams. On the other hand, an avoirdupois ounce, commonly used in the United States for everyday items, is lighter at 28.3495231 grams.
A troy ounce is a specific unit of weight measure used exclusively for precious metals like gold, silver, platinum, and palladium. Unlike the standard ounce used for everyday items, a troy ounce ensures accurate weight standards and purity in the precious metals market.