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Ideal Gas Law Calculator
Enter any three of pressure, volume, moles, and temperature to solve for the fourth using the ideal gas law.
How to use this tool
- 1Choose which variable to solve for.
- 2Enter the other three values.
- 3See the calculated result.
Frequently asked questions
Why does 1 mole equal 22.4 liters at STP?+
At standard temperature and pressure (0°C, 1 atm), PV = nRT works out to about 22.4 liters per mole for any ideal gas — a classic chemistry reference point.
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