Troy weight

Etymology and History of Troy Weight

• Troy weight takes its name from the French market town of Troyes.
• The name 'troy' is first attested in 1390.
• Charles Moore Watson proposes an alternative etymology related to the Assize of Weights and Measures.
• Troy weight referred to the tower system.
• The origin of the troy weight system is unknown.
• English troy weights were nearly identical to the troy weight system of Bremen.
• The troy weight system was indirectly derived from the Roman monetary system.
• Troy weights were first used in England in the 15th century.
• The troy ounce was officially adopted for coinage in 1527.

Units of Measurement in Troy Weight

• The troy pound consists of twelve troy ounces.
• A troy ounce weighs 480 grains.
• The pennyweight weighs 24 grains.
• There is no specific troy grain; all Imperial systems use the same measure of mass called a grain.
• Mint masses were legalized by Act of Parliament and have specific conversions.
• The standard British troy pound consists of twelve troy ounces.
• The troy pound is 5760 grains or 373.24172 grams.
• An avoirdupois pound is approximately 21.53% heavier than a troy pound.
• A troy ounce weighs 480 grains.
• The grain measure is defined as precisely 64.79891 milligrams.
• One troy ounce is approximately 31.10347680 grams.
• A troy ounce is about 9.7% more than an ounce avoirdupois.

Troy Weight in Bullion Coins

• Bullion coins are made from precious metals such as gold, silver, platinum, or palladium.
• They are used as an investment or store of value.
• Bullion coins are typically minted by government or private mints.
• They are usually sold at a premium above the intrinsic value of the metal.
• The weight and purity of bullion coins are guaranteed by the issuing authority.

Carat (Mass) and Conversion of Units

• The carat is a unit of mass used for measuring gemstones and pearls.
• It is equal to 200 milligrams or 0.2 grams.
• The carat is divided into 100 points, with each point representing 0.01 carats.
• The carat weight of a gemstone is an important factor in determining its value.
• The term 'carat' is derived from the carob seed, which was historically used as a counterweight in balance scales.
• Conversion of units is the process of changing the measurement of a quantity from one unit to another.
• In the case of troy weight, it can be converted to other units such as grams or ounces.
• Conversion factors are used to convert between different units of weight.
• Conversion tables or calculators can be used to simplify the conversion process.
• It is important to use accurate conversion factors to ensure precise measurements.

Fluid Ounce and Mark (Unit)

• The fluid ounce is a unit of volume used to measure liquids.
• In the troy weight system, the fluid ounce is equal to 480 grains or approximately 31.1035 grams.
• The fluid ounce is commonly used in the United States and other countries that use the imperial system.
• It is abbreviated as 'fl oz' or 'oz fl.'
• The fluid ounce is different from the avoirdupois ounce, which is used to measure weight.
• The mark is an obsolete unit of weight in the troy weight system.
• It was equal to 8 ounces or 248 grams.
• The mark was used in medieval Europe for measuring precious metals.
• It was commonly used in trade and commerce.
• The mark is no longer in official use but is sometimes used in historical or ceremonial contexts.

Troy weight Data Sources