Density Calculator

Solve ρ = m/V and convert the result between kg/m³, g/cm³, and lb/ft³ in your browser.

Solve for

Mass

Volume

Density

—kg/m³

—g/cm³

—lb/ft³

—specific gravity vs water

—ρ = m / V

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

Physics model preflight

Check the governing model before trusting the number

uniform bulk density

ρ = m / V

Reading the current native inputs…

Mass, volume and density are non-negative; whichever quantity is a denominator must be positive. This is an idealized educational model: unit consistency and valid inputs do not guarantee that omitted effects are negligible in a real system.

Density cross-unit & specific-gravity check

Solve mass, volume or density in a consistent SI model, then compare density with water to estimate specific gravity.

Solve forMass (g)Volume (mL)Density (g/mL)

—Solved quantity

—kg/m³

—Specific gravity vs water

Ready.

State the model before trusting the number

Classical formulas are only as good as their assumptions and units. Air resistance, damping, deformation, non-constant forces and measurement uncertainty are not silently invented when the selected model does not include them.

Governing physics model

ρ = m / V — uniform bulk density.

How to verify the result

Check the identity m = ρV after any solve mode. Changing display units must not change the underlying physical density.

Domain and assumption boundary

Mass, volume and density are non-negative; whichever quantity is a denominator must be positive. The calculator does not silently add drag, damping, deformation, varying fields, relativistic effects, measurement uncertainty, or geometry that the selected model does not contain.