Three density formulas
Density is ρ = m/V. Rearranging gives mass m = ρ × V and volume V = m/ρ. The calculator chooses the formula from the field marked with ? instead of asking you to rearrange it manually.
Calculators / Quick tool
Density, Mass & Volume Calculator
Solve one missing SI value in density (kg/m³) = mass (kg) / volume (m³).
● Processed locally in your browser
How to useHow to use Density, Mass & Volume Calculator ⌄
Solve one missing SI value in density (kg/m³) = mass (kg) / volume (m³).
- 1
Paste content, enter parameters or choose the files you need in “Density kg/m³, mass kg and volume m³; one ?”.
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Choose “Solve measurement” for the job. Processing runs in this browser.
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Review the result under “Solved SI measurement”, then copy or download it after checking the output.
Result guide
What Density, Mass & Volume Calculator calculates
Enter any two known SI values and replace the unknown with ?. The result identifies the matching form of ρ = m/V, substitutes your numbers, and keeps density in kg/m³, mass in kg, and volume in m³.
Worked SI example
For a mass of 780 kg occupying 0.1 m³, density is 780 ÷ 0.1 = 7,800 kg/m³. This is close to the density of common structural steel, so it is also a useful reasonableness check.
Units and limits
Convert all inputs to the displayed SI units before calculating. Mass cannot be negative, volume must be greater than zero, and this arithmetic tool does not adjust material density for temperature, pressure, porosity, or measurement uncertainty.
Frequently asked questions
How do I calculate volume from mass and density?
Use V = m/ρ. Mark volume with ?, then enter mass in kilograms and density in kilograms per cubic metre. The result is returned in cubic metres.
Can I enter grams and cubic centimetres directly?
Not in this version. The input labels are fixed to kg, m³, and kg/m³. Convert other units first so the three values remain dimensionally consistent.
Is mass the same as weight here?
No. The equation uses mass in kilograms. Weight is a force measured in newtons and depends on gravitational acceleration.
Anonymous feedback
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