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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.
Difference Between Ton and Metric Ton. Ton and metric ton are units of measurement but there is difference between the two. Metric ton is a unit based upon SI system and is equal to 1000 kilos. Thus it is a megagram as it contains 1 million grams. Why the words ton and metric ton are being used is interesting to note.