The tonne (unit symbol t) or metric ton, often redundantly referred to as a metric tonne, is a unit of mass equal to 1,000 kg (2,205 lb) or approximately the mass of one cubic metre of water at four degrees Celsius. It is sometimes abbreviated as mt in the United States, but this conflicts with other SI symbols. The tonne is not a unit in the International System of Units (SI), but is accepted for use with the SI.
OmegaWiki Dictionary
Ω
tonne A metric unit of mass equal to 1000 kilograms.
