Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using the ideal gas law
About this calculator
The Ideal Gas Law Calculator helps you solve for any unknown variable in the ideal gas equation PV = nRT, where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature. This tool is essential for chemistry students, engineers, and scientists working with gas calculations in laboratory settings, industrial processes, or academic research. Simply input three known values to calculate the fourth unknown parameter instantly.
How to use
Enter values for three of the four variables: pressure, volume, temperature, or number of moles. Select appropriate units for each input. Leave the variable you want to calculate blank, then click calculate to get your result with the corresponding unit.
Frequently asked questions
What is the ideal gas law equation?
The ideal gas law is PV = nRT, where P is pressure, V is volume, n is moles, R is the gas constant, and T is absolute temperature.
What units can I use for calculations?
Common units include atm or Pa for pressure, L or m³ for volume, K for temperature, and mol for amount of substance.
When does the ideal gas law not apply?
The ideal gas law breaks down at very high pressures, very low temperatures, or when gas molecules have significant intermolecular forces.