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The tonne is a "metric ton" or "megagram". The only prefixes normally used with this unit are :

  • kilotonne - (1000 tonnes, or 1 million kilograms)(1 x 106 kg or 1 x 109 grams)
  • megatonne - (1 million tonnes, or 1 billion kilograms) (1 x 109 kg or 1 x 1012 grams)

A zettatonne would equal to 1021 tonnes which is 1024 kilograms or 1027 grams.

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15y ago

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