Density Calculator
Density is mass packed into volume. Enter any two of mass, volume, and density and it works out the one you left blank.
Enter any two of the three and leave the last one blank. Volume is in cubic meters, so a liter is 0.001 m³.
Density
1,000kg/m³
Mass
1,000kg
Volume
1m³
How it works
Density is mass divided by volume, written ρ = m/V. Pack 1000 kg into one cubic meter and you get a density of 1000 kg/m³ — which happens to be plain water.
It's one equation, so any two values give you the third. Know the density and the volume? Multiply them for mass. Know density and mass? Divide to get volume. Leave a field blank and the tool rearranges automatically.
Watch your volume units: this calculator uses cubic meters, so a one-liter bottle is 0.001 m³. Convert small volumes before entering them or your density will come out a thousand times too big.
Frequently asked questions
What is the density of water?
Right around 1000 kg/m³, or 1 gram per cubic centimeter, at typical room conditions. That single number is why anything with a lower density floats on it and anything denser sinks.
How do I find volume from mass and density?
Divide the mass by the density. A 2000 kg block with a density of 8000 kg/m³ takes up 2000 / 8000 = 0.25 m³. Leave the volume field empty and this tool does it for you.
Why does my answer look huge?
Usually a units slip. Volume here is in cubic meters, not liters or milliliters, so entering a liter as 1 instead of 0.001 inflates the result by a factor of a thousand.