Density

Density Density of a system is the mass of the unit volume of the system. Note that the density is reciprocal of specific volume i.e.

The density of gases and vapors is dependent on temperature and pressure while density of most solids and liquids is dependent only on temperature with good precision for many engineering applications.
The SI unit of density is kg/m

(kilogram per cubic meter). Other units are:

1 t/m = 1000 kg/m
1 lbm/ft = 16.018 kg/m
1 lbm/(U.K.gal)= 99.776 kg/m
1 lbm/(U.S.gal)= 119.83 kg/m
1 slug/ft = 515.38 kg/m
1 g/cm = 1000 kg/m
1 U.K.ton/yd = 1328.94 kg/m
1 U.S.ton/yd = 1186.5 kg/m