Molar Volume of a Gas Calculator
⚗ Moles & Stoichiometry. Use the Molar volume of a gas formula to find volume of gas, amount: pick the value you want, type the others, and the answer updates as you go.
At room temperature and pressure (20 °C, 1 atm) one mole of any gas takes up 24 dm³ (22.4 dm³ at 0 °C).
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Volume of gas | dm³ |
| Amount | mol |
Worked example
Find the volume of gas when Amount = 0.5 mol.
Using V = n × 24 dm³: Volume of gas = 12 dm³.
Frequently asked questions
What is the formula for Molar volume of a gas?
V = n × 24 dm³. At room temperature and pressure (20 °C, 1 atm) one mole of any gas takes up 24 dm³ (22.4 dm³ at 0 °C).
What do the letters stand for, and what units are used?
Volume of gas in dm³, Amount in mol.
How do you calculate volume of gas?
Put the values into V = n × 24 dm³. For example, with Amount = 0.5 mol, volume of gas = 12 dm³.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (volume of gas, amount) and fill in the others: it rearranges the formula for you.
