in physics, density is represented by the symbol ρ (pronounced ròu). the main international unit is kg/m³, and the commonly used unit is g/cm³. its mathematical expression is ρ=m/v. in the international system of units, the main unit of mass is the kilogram, and the main unit of volume is cubic meters, so the mass of 1 cubic meter of material is taken as the density of the material. for non-uniform substances it is called the "average density".

density calculation:

density: d=m/v

d = density, m = mass, v = volume