Long ton

A long ton is the name used in the US for the unit called the "ton" in the avoirdupois or Imperial system of measurements, as used (alongside the metric system) in the United Kingdom and to some extent in other Commonwealth countries. It is equal to 2240 pounds (approximately 1016 kilograms). It has some limited use in the US, most commonly in measuring the displacement of ships.

The standard ton in the US measurement system is the "short ton", equal to 2000 pounds (approximately 907.2 kg).

The spelling "tonne" denotes the metric ton of 1000 kilograms (approximately 2204.6 pounds).