What is the Ideal Gas Law Calculator?
Solve PV = nRT for the pressure of an ideal gas.
Enter amount of gas, temperature and volume and the Ideal Gas Law Calculator returns pressure and in kilopascals. Results update as you type, and nothing you enter leaves your device.
How it is calculated
P = nRT ÷ V, with R = 0.082057 L·atm/(mol·K) and T in kelvin
How to use it
- Enter amount of gas in mol.
- Enter temperature in °C.
- Enter volume in L.
- Read pressure in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Ideal Gas Law Calculator use?
It uses: P = nRT ÷ V, with R = 0.082057 L·atm/(mol·K) and T in kelvin.
What do I need to use the Ideal Gas Law Calculator?
You need amount of gas, temperature and volume. Sensible starting values are filled in so you can see how it works straight away.
Is the Ideal Gas Law Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.