A tonne (t) or metric ton, also referred to as a metric tonne or tonne métrique, is a measurement of mass equal to 1,000 kilograms, or 2204.6226 pounds. It is not an SI unit but is accepted for use with the SI.[1] The proper SI unit for a tonne would be a "megagram" (Mg, see SI prefix), but this term is rarely used in practice.
Spelling[]
Though the spelling tonne predates the introduction of the SI system in 1960 (it has been used in France for about two and a half centuries, where it comes from), it is now used as the standard spelling for the metric mass measurement in some English-speaking countries.
In the United States the correct term is metric ton.[2]
The comparable imperial and US customary units are spelled ton in English.
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