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