Weight Units

International System of Units (SI)

The unit of mass in the SI system is kilogram, which corresponds to the international standard stored in France. Until the 20th century, historically, for a measure of weight of 1 kg, a mass of 1 liter of water was taken at a temperature of 4 degrees and standard atmospheric pressure at 0 m sea level. In metrological measurements, as well as in instrument scales, the derived units of a kilogram can be used.

• 1 Gram [g] = 0.001 kg
• 1 Milligram [mg] = 0.001 g
• 1 Microgram [μg] = 0.001 mg

• 1 Quintal (metric) [q] = 100 kg
• 1 Tonne [t] = 1000 kg

Other units can also be used:

• 1 Carat [ct] = 0.2 g.
• 1 Newton [N] = 0.980665 kg.

Imperial and Customary units

In the US and Britain, the following units of weight are common:

• 1 Stone [st] = 6350.29318 g.
• 1 Pound [lb] = 453.59237 g.
• 1 ounce [oz] = 28.349523125 g.

British and American tons and a centner differ from each other.

American weight units

• 1 American short ton = 907.18474 kg.
• 1 American short centner = 45.359237 kg.

British weight units

• 1 British long ton = 1016.0469088 kg.
• 1 British long centner = 50.80234544 kg.

Troy measure of weight

The name 'Troy' comes from the city of Troyes in France. It is used in banking, jewelry to measure the weight of precious metals. Currently, it is used as a basic measure in the precious metals trade.

• 1 Troy Pound = 373.2417216 g.
• 1 Troy ounce = 1/12 pounds = 31.1034768 g.
• 1 Pennyweight = 1/20 troy ounce = 1.55517384 g
• 1 Mt = 1/480 pennyweight = 3.2399455 mg.