Density Calculator
Calculate density with ρ = m / V. Solve for density, mass, or volume by entering the other two values, with results in kg/m³ and g/cm³.
Density (ρ = m / V)
800 kg/m³
Density in g/cm³
0.8 g/cm³
Density: ρ = m / V. SI unit kg/m³ (1 g/cm³ = 1,000 kg/m³). Water ≈ 1,000 kg/m³.
Frequently Asked Questions
What is the density formula?
Density is mass divided by volume: ρ = m / V. In SI units mass is in kilograms and volume in cubic metres, giving density in kg/m³. It is also commonly expressed in g/cm³, where 1 g/cm³ = 1,000 kg/m³.
How do I calculate density?
Divide the mass by the volume. For example, 200 kg occupying 0.25 m³ has a density of 200 / 0.25 = 800 kg/m³.
How do I find mass from density and volume?
Rearrange to m = ρ × V. Multiply the density by the volume.
How do I find volume from density and mass?
Rearrange to V = m / ρ. Divide the mass by the density.
What is the density of water?
Pure water at 4 °C has a density of about 1,000 kg/m³, or equivalently 1 g/cm³. Materials denser than water sink; those less dense float.