Density Calculator
Density calculator: ρ = m/V. Find density, mass or volume in g/cm³, kg/m³, g/mL, lb/ft³ and more.
ρ = mV
How to use this calculator
- Choose the quantity you want under “Solve for”.
- Type the known values and pick their units: any combination works.
- The result updates as you type. Open “Show the steps” to see the substitution.
Density is mass per unit volume, ρ = m/V. Water has a density of about 1.000 g/cm³ at 4 °C, so objects with higher density sink in it.
Use it to identify materials, convert between mass and volume of a liquid, or check the purity of a sample.
Formula
ρ = mV
| Symbol | Quantity | Units |
|---|---|---|
| m | Mass | kg, g, mg, µg, t, lb, oz, st, US ton, ct, Da |
| V | Volume | L, mL, µL, m³, dm³, cm³, gal, gal (UK), qt, pt, cup, fl oz, ft³, in³ |
| ρ | Density | kg/m³, g/cm³, g/mL, g/L, kg/L, lb/ft³, lb/gal |
Worked example
Given: m = 500 g · V = 250 mL
ρ = mV
Result: ρ = 2 g/mL
Frequently asked questions
What is the density of water?
About 0.9982 g/cm³ at 20 °C and 0.99997 g/cm³ at 4 °C.
Are g/cm³ and g/mL the same?
Yes. 1 mL equals 1 cm³ exactly.