Weight Converter / Mass Converter
Use this weight & mass converter to convert instantly between pounds, ounces, kilograms, grams, stones, tonnes and other metric and imperial weight units. If you're unsure about the definitions of mass and weight, see our article: what is the difference between mass and weight?.
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Conversion units currently available for the weight and mass converter
Carats (metric) (CM), Centigrams (cg), Decigrams (dg), Dekagrams (dag), Grains (gr), Grams (g), Kilograms (kg), Micrograms (mcg), Milligrams (mg), Newtons (N), Ounces Avoir (oz), Ounces Troy (t oz), PennyWeights (pwt), Pounds Avoir (lb), Pounds Troy, Slugs, Stone (UK) (st), Stone (US), Tonnes (metric ton) (t), Tons (UK long ton), Tons (US short ton),
Weight Converter / Mass Converter Definitions
An avoirdupois ounce is equal to 28.349523125 grams. The ounce is commonly used as a unit of mass in the United States and around the World.
A troy ounce (abbreviation: t oz) is equal to 31.1034768 grams. Today, the troy ounce is used only to express the mass of precious metals such as gold, platinum or silver.
The pound (abbreviations: lb or, sometimes in the United States, #) is a unit of mass in a number of different systems, including various systems of units of mass that formed part of English units, Imperial units, and United States customary units. Its size can vary from system to system. The most commonly used pound today is the international avoirdupois pound.
Troy weight originates from the troy system of mass and dates back to before the time of William the Conqueror. The troy pound is no longer in general use. In Canada, Australia, the UK, and other places the troy pound is no longer a legal unit for trade. In the United Kingdom, the use of the troy pound was abolished on 6 January 1879. The troy pound is still used for measurements of precious metals such as gold, silver, and platinum, and sometimes gems such as opals.