Troy Ounce: Definition, History, and Conversion Table

The troy ounce is a unit of mass equal to 31.1034768 grams, or approximately 1.09714 avoirdupois ounces. It is used primarily for measuring precious metals, such as gold, silver, and platinum. The troy ounce is named after Troyes, a city in France where it was first used in the Middle Ages.

The troy ounce is one of two primary units of mass used for precious metals, the other being the avoirdupois ounce. The troy ounce is smaller than the avoirdupois ounce, and is therefore used for measuring smaller quantities of precious metals. For example, a troy ounce of gold is equal to 12 troy pennyweights, while an avoirdupois ounce of gold is equal to 16 avoirdupois pennyweights.

The troy ounce is also used for measuring other commodities, such as lead, tin, and zinc. However, it is most commonly used for measuring precious metals.

The troy ounce has been used for centuries as a unit of mass for precious metals. It is a reliable and accurate unit of measurement, and is used by jewelers, bullion dealers, and other businesses that deal with precious metals.

The troy ounce is defined as exactly 31.1034768 grams. This definition was adopted by the International Bureau of Weights and Measures in 1959.

The troy ounce is not used in the metric system. However, it can be converted to metric units using the following conversion factors:

1 troy ounce = 31.1034768 grams
1 troy ounce = 0.0311034768 kilograms
1 troy ounce = 0.000311034768 tonnes

The troy ounce is a valuable unit of measurement for precious metals. It is a reliable and accurate unit, and is used by businesses around the world.