What is the formula for density?

Density (ρ) = Mass / Volume, or D = m/V. The SI unit is kg/m³. Density of water is approximately 1,000 kg/m³ (1 g/cm³).

Why does density matter?

Density determines whether an object floats or sinks (buoyancy), affects material strength-to-weight ratios, and is used to identify unknown substances.

Density Calculator

Quick answer: Enter any two of mass, volume, or density to solve for the third.

Calculate density (D = m/V), mass, or volume. Enter any two of the three values to solve for the third. Used in physics, chemistry, engineering, and material science.

Last reviewed: April 2026Report an error

Solve For

Mass (kg)

Volume (m³)

Density

2000.0000 kg/m³

density calculated.

Density (kg/m³)

2000.0000

How to Use This Density Calculator

1Select what you want to solve for: density, mass, or volume.
2Enter the two known values.
3Read the result.

Frequently Asked Questions

: Density (ρ) = Mass / Volume, or D = m/V. The SI unit is kg/m³. Density of water is approximately 1,000 kg/m³ (1 g/cm³).
: Density determines whether an object floats or sinks (buoyancy), affects material strength-to-weight ratios, and is used to identify unknown substances.

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Density Calculator

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