# Cubic metre

Cubic metre | |
---|---|

One cubic metre of concrete (representing the world annual production per inhabitant). | |

General information | |

Unit system | SI |

Unit of | volume |

Symbol | m³ or ㎥ |

The **cubic metre** (in Commonwealth 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.^{[1]} Its SI symbol is **m ^{3}**.

^{[1]}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.

## Conversions

1 cubic metre = 1000 litres (exactly) ^{[2]}^{[3]}≈ 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) and standard atmospheric pressure (101.325 kPa) has a mass of 1000 kg, or one tonne. At 0 °C, the freezing point of water, a cubic metre of water has slightly less mass, 999.972 kilograms.

It is sometimes abbreviated to **cu m**, **m3**, **M3**, **m^3**, **m**3**, **CBM**, **cbm** when superscript characters or markup cannot be used (e.g. in some typewritten documents and postings in Usenet newsgroups). The "cubic metre" symbol is encoded by Unicode at code point U+33A5 ㎥ SQUARE M CUBED ❰ ㎥ ❱.^{[4]}

Abbreviated **CBM** and **cbm** in the freight business and **MTQ** (or numeric code 49) in international trade.

## Multiples and submultiples

### Multiples

- Cubic decametre
- the volume of a cube of side length one decametre (10 m)
- equal to a megalitre
- 1 dam
^{3}= 1000 m^{3}= 1 ML

- Cubic hectometre
- the volume of a cube of side length one hectometre (100 m)
- equal to a gigalitre
- in civil engineering abbreviated MCM for million cubic metres
- 1 hm
^{3}= 1000000 m^{3}= 1 GL

- Cubic kilometre
- the volume of a cube of side length one kilometre (1000 m)
- equal to a teralitre
- 1 km
^{3}= 1000000000 m^{3}= 1 TL (810713.19 acre-feet; 0.239913 cubic miles)

### Submultiples

- Cubic decimetre
- the volume of a cube of side length one decimetre (0.1 m)
- equal to a litre
- 1 dm
^{3}= 0.001 m^{3}= 1 L - (also known as DCM (=Deci Cubic Meter) in Rubber compound processing)

- Cubic centimetre
^{[5]} - the volume of a cube of side length one centimetre (0.01 m)
- equal to a millilitre
- 1 cm
^{3}= 0.000001 m^{3}= 10^{−6}m^{3}= 1 mL

- Cubic millimetre
- the volume of a cube of side length one millimetre (0.001 m)
- equal to a microlitre
- 1 mm
^{3}= 0.000000001 m^{3}= 10^{−9}m^{3}= 1 µL

## Notes

- ^
^{a}^{b}Bureau International de Poids et Mesures. "Derived units expressed in terms of base units Archived 2012-07-16 at the Wayback Machine". 2014. Accessed 7 August 2014. **^**From 1901 to 1964 the litre was defined as the volume of one kilogram of pure water at 4°C and 760 millimetres of mercury pressure. During this time, a litre was about 1.000028 dm^{3}. In 1964 the original definition was reverted to.**^**"Archived copy". Archived from the original on 2009-10-01. Retrieved 2010-03-05.CS1 maint: archived copy as title (link)**^**Unicode Consortium (2019). "The Unicode Standard 12.0 – CJK Compatibility ❰ Range: 3300—33FF ❱" (PDF).*Unicode.org*. Retrieved May 24, 2019.**^**The cubic centimetre is the base unit of volume of the CGS system of units. The colloquial abbreviations "cc"/"㏄" and "ccm" are not SI but are common in some contexts such as cooking, engine displacement and medicine.