The Kilogram per cubic metre reference article from the English Wikipedia on 24-Apr-2004
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Kilogram per cubic metre

Kilogram per cubic meter is the SI measure of density and is represented as kg/m³. Where kg stands for kilogram and m³ stands for cubic meter. The density of water is about 1000 kg/m³ (since a cubic meter of water weighs about a tonne).

To convert from g/cm³, the metric system unit of density, to kg/m³, multiply by 1000 (divide by 1000 for the opposite conversion). A gram per liter, however, is identical in value to kg/m3.

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