Molar Volume Calculator

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?

  1. 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.

  2. Next, determine the density.

    For this example we will say the density is 5 g/L.

  3. Finally, calculate the molar volume.

    The molar volume is 20/5 = 4 L/mol


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.

molar volume calculator
molar volume formula