Density - is the ratio of the mass of a substance to its volume. The standard SI unit for density is the kg/m³ (kilogram per cubic meter), the symbol is ρ.

Density formula:
ρ = m/v
Where:
m - mass
V - volume

this an application tool convert between various density units including
support conversion between kilogram/cubic meter, kg/cm³, g/cm³, lb/ft³, lb/in³, lb/gal, mg/m³
density converter

dont worry about your phone storage because its movable to SD card