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In Britain for example, prior to the introduction of the SI system, the ton that was used was equal to 2240 pounds (1016kg), and since this value is very close to actual metric tonne (1000kg), people felt very little difference between the earlier ton and the metric tonne.
Learn the difference between a short ton, a long ton and a metric ton. A short ton equals 2,000 pounds. A short ton or U.S. ton or net ton (sometimes just ton) equals 2,000 pounds, a long ton or an avoirdupois ton is 2,240 pounds and a metric ton or tone is 2,204.62 pounds. The difference between a short ton, a long ton and a metric ton are given below: