# What is the basic SI unit of density?

The derived SI unit for density is $\left({\text{kg")/("m}}^{3}\right)$.
Density is an SI derived unit. It is derived from the SI fundamental unit for mass, the kilogram, and the SI fundamental unit for length, the meter. Density is the mass per unit of volume. The SI derived unit for volume is cubic meters. So the derived SI unit for density is $\left(\text{kg")/("m"^3}\right)$.