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Gas Law Calculators

Molar Volume Calculator

Volume occupied by one mole of gas at any temperature and pressure, and the volume of a given amount.

Enter values

Results update as you type.

Result

Molar volume

22.71095 L/mol

Volume of 1 mol
22.711 L
In m³/mol
0.022711
Pressure used
100,000 Pa
Temperature used
273.15 K

About the Molar Volume Calculator

Volume occupied by one mole of gas at any temperature and pressure, and the volume of a given amount.

Also known as: 22.4 l/mol, gas volume at stp, volume of one mole, stp volume.

How to use this calculator

  1. Enter conditions, moles of gas.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

V_m = RT / P

Worked example

Using the values pre-filled in the calculator above:

  • Conditions: STP (0 °C, 100 kPa)
  • Moles of gas = 1 mol

the calculator returns:

  • Molar volume: 22.71095 L/mol
  • Volume of 1 mol: 22.711 L
  • In m³/mol: 0.022711
  • Pressure used: 100,000 Pa

Frequently asked questions

Is molar volume 22.4 L or 24 L?

22.4 L/mol is at 0 °C and 1 atm; 22.7 L/mol at the modern STP of 100 kPa; about 24 L/mol at room temperature.