The kilogram per cubic metre (symbol: kg·m
−3, or kg/m
3) is the unit of
density
Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematicall ...
in the
International System of Units (SI), defined by
mass
Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a physical body, until the discovery of the atom and particle physics. It was found that different atoms and different element ...
in
kilogram
The kilogram (also kilogramme) is the unit of mass in the International System of Units (SI), having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially ...
s divided by
volume
Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch). Th ...
in
cubic metre
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 unit of volume in the International System of Units (SI). Its symbol is ...
s.
Conversions
*1 kg/m
3 = 1 g/
L (exactly)
*1 kg/m
3 = 0.001
g/cm3 (exactly)
*1 kg/m
3 ≈ 0.06243
lb/
ft3 (approximately)
*1 kg/m
3 ≈ 0.1335
oz/
US gal (approximately)
*1 kg/m
3 ≈ 0.1604 oz/
imp gal
The gallon is a unit of volume in imperial units and United States customary units. Three different versions are in current use:
*the imperial gallon (imp gal), defined as , which is or was used in the United Kingdom, Ireland, Canada, Au ...
(approximately)
*1
g/cm3 = 1000 kg/m
3 (exactly)
*1 lb/ft
3 ≈ 16.02 kg/m
3 (approximately)
*1 oz/(US gal) ≈ 7.489 kg/m
3 (approximately)
*1 oz/(imp gal) ≈ 6.236 kg/m
3 (approximately)
Relation to other measures
The density of water is about 1000 kg/m
3 or 1 g/cm
3, because the size of the gram was originally based on the mass of a cubic centimetre of water.
In
chemistry, g/cm
3 is more commonly used.
See also
*
Gram per cubic centimetre
References
External links
Official BIPM definition of the kilogram
{{DEFAULTSORT:Kilogram Per Cubic Metre
SI derived units
Units of chemical measurement
Units of density