Units of Mass/weight
There are several similar units of mass or volume called the ton:
| Full name(s) | Common name | Quantity | Notes |
|---|---|---|---|
| long ton, weight ton, gross ton | "ton" (UK) | 2,240 lb (1,016.047 kg) | Used in countries such as the United Kingdom and Commonwealth of Nations that formerly used, or still use the Imperial system |
| short ton, net ton | "ton" (US) | 2,000 lb (907.1847 kg) | Used in the U.S., and formerly in Canada |
| tonne | "tonne"; "metric ton"
(mainly US) |
1,000 kg (2,204.623 lb) | Defined in the International System of Units.
In the UK, Canada, Australia, and other areas that had used the Imperial system, the tonne is the form of ton legal in trade. 1.6% less than the long ton. |
| ton shortweight | 2240 lb | Used in the iron industry in the 17th and 18th centuries. | |
| ton longweight | 2400 lb | Used in the iron industry in the 17th and 18th centuries. |
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