A unit of volume of sea freight, equal to 40 cubic feet. Also known as freight ton; measurement ton; shipping ton.

A unit of refrigerating capacity, that is, of rate of heat flow, equal to the rate of extraction of latent heat when one short ton of ice of specific latent heat 144 international table British thermal units per pound is produced from water at the same temperature in 24 hours; equal to 200 British thermal units per minute, or to approximately 3516.85 watts. Also known as standard ton.

1. A unit of weight in common use in the United States, equal to 2000 pounds or 907.18474 kilogram-force. Also known as just ton; net ton; short ton.

2. A unit of mass in common use in the United Kingdom equal to 2240 pounds, or to 1016.0469088 kilogram-force. Also known as gross ton; long ton.

3. A unit of weight in troy measure, equal to 2000 troy pounds, or to 746.4834432 kilogram-force.

4. See <<tonne>>

A unit of internal capacity of ships, equal to 100 cubic feet. Also known as register ton.

The energy released by one metric ton of chemical high explosives calculated at the rate of 1000 calories per gram; equal to 4.18 × 10⁹ joules; used principally in expressing the energy released by a nuclear bomb.