Density calculator

Density tells you how much mass fits in a unit of volume:

$\rho=\frac{m}{V}$

Enter two of the three quantities ($\rho$, $m$, $V$) and the calculator works out the third. The SI unit of density is kg/m³, but g/cm³ is often convenient ($1\ \tfrac{\text{g}}{\text{cm}^3}=1000\ \tfrac{\text{kg}}{\text{m}^3}$).

Density decides floating: a body less dense than the fluid floats on its surface, a denser one sinks. The presets contain typical values (water 1000, iron 7870, gold 19 300 kg/m³).