Kilogram per cubic metre

The kilogram per cubic metre (symbol: kg·m⁻³, or kg/m³) is the unit of density in the International System of Units (SI). It is defined by dividing the SI unit of mass, the kilogram, by the SI unit of volume, the cubic metre.

Conversions

To other units

• 1 kg/m³ = 1 g/L (exactly)
• 1 kg/m³ = 0.001 g/cm³ (exactly)
• 1 kg/m³ ≈ 0.06243 lb/ft³ (approximately)
• 1 kg/m³ ≈ 0.1335 oz/US gal (approximately)
• 1 kg/m³ ≈ 0.1604 oz/imp gal (approximately)

From other units

• 1 g/cm³ = 1000 kg/m³ (exactly)
• 1 lb/ft³ ≈ 16.02 kg/m³ (approximately)
• 1 oz/(US gal) ≈ 7.489 kg/m³ (approximately)
• 1 oz/(imp gal) ≈ 6.236 kg/m³ (approximately)

Relation to other measures

The density of water is about 1000 kg/m³ or 1 g/cm³, because the size of the gram was originally based on the mass of a cubic centimetre of water.

In chemistry, g/cm³ is more commonly used.

See also

• List of metric units
• MKS units

References

External links

• Official BIPM definition of the kilogram
• Official BIPM definition of the metre