This density calculator solves the mass–volume–density triangle, finding whichever value is missing.
Physics
Density Calculator
Calculate density, mass or volume from the density formula.
Calculator
About this calculator
Formula notes
ρ = m / V, so m = ρ·V and V = m / ρ. Water is about 1000 kg/m³ = 1 g/cm³.
Worked examples
- Example: 1 kg occupying 1 m³ has density 1 kg/m³ = 0.001 g/cm³, as the defaults show.
- A sample with mass 540 g and volume 200 cm3 has density 2.70 g/cm3, numerically matching 2700 kg/m3 after unit conversion.
How to use it
- Enter any two of mass, volume, and density.
- Keep units consistent (kg/m³ or g/cm³).
- Read the missing third value.
Frequently asked questions
Why does ice float on water?
Ice is about 917 kg/m³, less dense than liquid water at 1000 kg/m³.
How do kg/m³ and g/cm³ convert?
1 g/cm³ = 1000 kg/m³, so multiply or divide by 1000.
Limits and interpretation
- Density can depend on temperature, pressure, composition, porosity, and whether bulk or true material volume is measured.
- Mass and volume must describe the same sample and state; displaced, trapped, or absorbed fluid can bias the volume.