How it's calculated
ρ = m ÷ V (m = ρ × V, V = m ÷ ρ)
ρ = density, m = mass, V = volume. Solve for any one from the other two; inputs are normalised to SI (kg, m³, kg/m³) before converting to the chosen output unit.
Common questions
What is the density formula?
Density equals mass divided by volume. Rearranged, mass is density times volume, and volume is mass divided by density.
What is the density of water?
About 1,000 kg/m3, or 1 g/cm3, at standard conditions.