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Density Calculator
Find density from mass and volume, or solve for the missing mass or volume from the other two values.
Density calculator
Result: —
Formula: —
How to use the Density Calculator
- Pick whether you want to solve for density, mass or volume.
- Enter the two values you already know in the boxes.
- Read the computed value and the formula used in the result panel.
Features
- Solves for density, mass or volume
- Shows the formula used for the result
- Works with decimals and large numbers
- Runs locally, no uploads
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Frequently Asked Questions
Common questions about the free online density calculator.
Enter the mass in grams and the volume in millilitres and the calculator returns density in
grams per millilitre.
Density equals mass divided by volume, written as d = m / V, where m is mass and V is volume.
Pure water has a density of about 1 gram per millilitre at room temperature, which is also
1000 kilograms per cubic metre.
Switch the solve mode to mass, enter the density and the volume, and the calculator
multiplies them together.
Switch the solve mode to volume, enter the mass and the density, and the calculator divides
mass by density.
Mass is entered in grams and volume in millilitres, so density is expressed in grams per
millilitre and results stay consistent.
A high density means a lot of mass is packed into a small volume, as happens with metals such
as iron, lead and gold.
Yes. Kilograms and litres are the same ratio as grams and millilitres, so the density number
comes out exactly the same.
No. Every density calculation runs locally in your browser, so your numbers are never sent
anywhere or stored.
Yes. It is completely free and unlimited, with no account, no sign-up, no adverts blocking
the tool and no usage caps.
Last updated: October 10, 2026