The **cubic metre** (symbol **m³**) is the SI unit of volume. Since a "cube" is a shape formed by having the same length, breadth and height, a cubic metre refers to a unit of volume that is one metre in length, breadth and height (**1m ^{3}**). In other words, it is a cube with a length of one metre, with 1,000 litres of space.

In the United States it is spelled "**cubic meter**". Other names are **stère** and **kilolitre**, spelled **kiloliter** in the United States.

## Conversions

1 cubic metre equals:

- 1,000 litres
- Approximately 35.3 cubic feet
- Approximately 1.31 cubic yards
- Approximately 6.29 oil barrels

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, it is slightly less, 999.972 kg.

It is sometimes abbreviated ** cu m**,

**,**

`m3`**or**

`m^3`**when superscript characters or markup are not available/accessible (i.e. in some typewritten documents and postings in Usenet newsgroups).**

`m**3`Abbreviated **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}= 1,000 m^{3}= 1 ML

- Cubic hectometre
- the volume of a cube of side length one hectometre (100 m)
- equal to a gigalitre
- 1 hm
^{3}= 1,000,000 m^{3}= 1 GL

- Cubic kilometre
- the volume of a cube of side length one kilometre (1,000 m)
- equal to a teralitre
- 1 km
^{3}= 1,000,000,000 m^{3}= 1 TL

### 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

- Cubic centimetre
- 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

*Kiddle Encyclopedia.*