Ideal Gas Law Calculator
Solve PV = nRT for any variable: pressure, volume, temperature, or moles of an ideal gas.
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Frequently Asked Questions
When does the ideal gas law fail?
At high pressures (>10 atm) or low temperatures (near condensation). Real gases deviate due to intermolecular forces and molecular volume. Use the Van der Waals equation for accuracy.
How do I convert Celsius to Kelvin?
Add 273.15. For example, 25 degrees C = 298.15 K. Never use Celsius in gas law calculations.