ρ = m ÷ V — fill in every field except the one you want; the empty field is solved for.
Material density:
Density (ρ) = 2.7 g/cm³
- Convert V: 20 cm³ =
20 mL - Rearrange:
ρ = m ÷ V - Substitute:
(54 g) ÷ (20 mL)=2.7 g/mL
How it works
The calculator converts every value you type into grams and millilitres, solves ρ = m ÷ V for the empty field, and converts the answer back into whichever unit you chose. The presets fill in typical densities at room temperature; element values match the element pages on this site.
Density depends on temperature, especially for liquids and gases: water is 0.9998 g/mL at 0 °C, 0.998 g/mL at 20 °C and 0.958 g/mL at 100 °C. For precise work, use a value measured at your temperature.
Frequently asked questions
- How do I calculate density?
- Divide mass by volume: ρ = m ÷ V. A 54 g block of aluminium with a volume of 20 cm³ has a density of 54 ÷ 20 = 2.7 g/cm³.
- Are g/cm³ and g/mL the same?
- Yes. One cubic centimetre is exactly one millilitre, so 1 g/cm³ = 1 g/mL = 1000 kg/m³ = 1 kg/L.
- How can I find the volume of an irregular object?
- Use water displacement: lower the object into a measuring cylinder of water and read how much the level rises. That rise is the object's volume, which you can then use with its mass to find density.
- Why does ice float on water?
- Ice (about 0.917 g/cm³) is less dense than liquid water (about 1.00 g/cm³), because hydrogen bonds hold the molecules in an open lattice when water freezes.
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