The cubic metre (in British English and international spelling as used by the International Bureau of Weights and Measures) or cubic meter (in American English) is the SI derived unit of volume. Its SI symbol is m3. It is the volume of a cube with edges one metre in length. An alternative name, which allowed a different usage with metric prefixes, was the stère, still sometimes used for dry measure (for instance, in reference to wood). Another alternative name, no longer widely used, was the kilolitre.
|1 cubic metre||= 1000litres (exactly)|
|≈ 35.3 cubic feet|
|≈ 1.31 cubic yards|
|≈ 6.29 oil barrels|
|≈ 220 imperial gallons|
|≈ 264 US fluid gallons|
A cubic metre of pure water at the temperature of maximum density (3.98 °C or 39.16 °F) and standard atmospheric pressure (1013.25 kPa) has a mass of kg, or one 1000 tonne. At 0 °C (32 °F), the freezing point of water, a cubic metre of water has slightly less mass, 999.972 kilograms.
Abbreviated CBM and cbm in the freight business and MTQ (or numeric code 49) in international trade.
See Orders of magnitude (one cubic millimetre to one cubic metre) for a comparison with other volumes.