In physics, density is known by notation ρ (read as rou). The SI main unit is the unit of kg/m³, and the common unit is g/cm³. The math expression is ρ=m/V. In the International System of Units, the main unit of Quality is the kilogram and the main unit of volume is cube meter, so 1 cube meter of substance Quality is taken as substance density. For inhomogeneous substances it is called "average density".

density Calculator ：

density ：d=m/v

d = density ，m = Quality ，v = volume