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A metric ton is a unit of measurement based on the metric system, rather than the standard, or imperial, system more commonly used in the United States. It is known as a tonne in most other countries, and is equivalent to 1,000 kilograms. Strictly speaking, it is a megagram, being one million grams.
In the United States, the ton most commonly used is the short ton. In the United Kingdom, a tonne is a metric ton and is equal to 1,000 kilograms or 2,240 pounds. To avoid confusion, these terms are commonly called long tons and short tons.. The term ton can also be used as a measurement of power.