Enter the pressure, temperature, and the molar mass into the calculator to determine the density of a gas.

## Gas Density Formula

The following formula is used to calculate the density of a gas.

d = P*M / R*T

- Where d is the density (g/L)
- P is the pressure (atm)
- M is the molar mass (g/mol)
- R is the gas constant (.0821 (atm*L/mol*K)
- T is the temperature (K)

To calculate the gas density, multiply the pressure by the molar mass, then divide by the product of the gas constant and temperature.

## Gas Density Definition

A gas density is defined as the total mass of a gas per unit of volume that is dependent on the pressure, molar mass, and temperature of the gas.

## Gas Density Example

How to calculate gas density?

**Fist, determine the pressure.**Calculate or measure the pressure acting on the gas in atmospheres.

**Next, determine the temperature.**Measure the temperature of the gas in kelvin.

**Next, determine the molar mass.**Calculate the molar mass in g/mol.

**Finally, calculate the gas density.**Calculate the gas density using the formula above.

## FAQ

**What determines the density of a gas?**

The density of a gas is dependent on the pressure, temperature, and molar mass.