Enter the molar mass and the mass density into the calculator to determine the molar volume.

## Molar Volume Formula

The following formula is used to calculate a molar volume.

Vm = M / ρ

- Where VM is the molar volume (L/mol)
- M is the molar mass (g/mol)
- ρ is the mass density (g/L)

## Molar Volume Definitoin

A molar volume is defined as the total liters or total volume occupied per mole of a substance.

## Molar Volume Example

How to calculate molar volume?

**First, determine the molar mass.**The molar mass is the number of grams per mole of a substance. For this example we will say this is 20 g/mol.

**Next, determine the density.**For this example we will say the density is 5 g/L.

**Finally, calculate the molar volume.**The molar volume is 20/5 = 4 L/mol

## FAQ

**What is molar volume?**

Molar volume is measure of the molar mass per unit density. At standard temperature and pressure the molar volume is the volume that one mole of a given molecule occupies.