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Density Calculator
Calculate density from mass and volume, or find a missing mass or volume. See metric and US customary density units, or estimate a mixture from its components.
How do I calculate density?
Density equals mass divided by volume. Enter exactly two values in kilograms, cubic meters and kilograms per cubic meter. For example, 10 kg ÷ 2 m³ = 5 kg/m³. The mixture mode adds component masses and volumes, assuming their volumes are additive.
Frequently asked questions
How do I calculate density?
Density equals mass divided by volume. Enter exactly two values in kilograms, cubic meters and kilograms per cubic meter. For example, 10 kg ÷ 2 m³ = 5 kg/m³. The mixture mode adds component masses and volumes, assuming their volumes are additive.
Are my measurements uploaded?
No. The calculations run in this browser; your values are not uploaded or saved.
What is the formula for density?
Density is mass divided by volume: ρ = m / V. This calculator uses kg, m³ and kg/m³, and also reports g/cm³ and lb/ft³.
Can I calculate mass or volume instead?
Yes. Enter any two of mass, volume and density, leaving the value you want to find blank. All entered values must be positive.
How does mixture density work?
Enter each component’s mass and volume on its own line. The tool divides total mass by total volume and assumes the component volumes are additive. Real mixtures may shrink, expand, dissolve or contain voids, so measured final volume is more accurate when that matters.