# Specific Gravity of Gas

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Specific gravity of gas is the ratio of the density of the gas to the density of air at a standard pressure and temperature.

### Specific Gravity of Gas formula

$$\large{ SG= \frac{\rho_g} {\rho_a} }$$

Where:

$$\large{ SG }$$ = specific gravity of gas

$$\large{ \rho_a }$$ = density of air

$$\large{ \rho_g }$$ = density of gas