# Cubic metre

(Redirected from Cubic kilometer)
One cubic metre of concrete (representing the world annual production per inhabitant)

The cubic metre (symbol ) 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 (1m3). 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:

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

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 dam3 = 1,000 m3 = 1 ML
Cubic hectometre
the volume of a cube of side length one hectometre (100 m)
equal to a gigalitre
1 hm3 = 1,000,000 m3 = 1 GL
Cubic kilometre
the volume of a cube of side length one kilometre (1,000 m)
equal to a teralitre
1 km3 = 1,000,000,000 m3 = 1 TL

### Submultiples

Cubic decimetre
the volume of a cube of side length one decimetre (0.1 m)
equal to a litre
1 dm3 = 0.001 m3 = 1 L
Cubic centimetre
the volume of a cube of side length one centimetre (0.01 m)
equal to a millilitre
1 cm3 = 0.000001 m3 = 10-6 m3 = 1 mL
Cubic millimetre
the volume of a cube of side length one millimetre (0.001 m)
equal to a microlitre
1 mm3 = 0.000000001 m3 = 10-9 m3 = 1 µL