Ideal Gas Law Calculator
How to use the ideal gas law calculator
- Choose what to calculate: pressure, volume, amount or temperature.
- Type the other three values and choose their units.
- The answer appears in the unit you choose.
Frequently asked questions
Which value of R is used?
8.314 J/(mol·K), which is 0.08206 L·atm/(mol·K). Units are converted before and after, so you do not need to convert them yourself.
What is the volume of one mole of gas?
About 22.4 L at 0 °C and 1 atm, and about 24.5 L at 25 °C.