Ideal Gas Law Calculator

Solve the ideal gas law for any one of pressure, volume, amount of gas or temperature.

What Do You Want to Find?
Fractions and decimals both work.
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Result
In other units
Temperature in kelvin
Gas constant used
Work

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The Ideal Gas Law

PV = nRT   R = 8.314462618 L·kPa/(mol·K) = 0.082057 L·atm/(mol·K)

Temperature must be absolute (kelvin): K = °C + 273.15. This page takes kPa, liters, moles and °C.

Worked Example

Tips

Real gases follow the ideal gas law closely at ordinary temperatures and pressures, less so at high pressure or near condensation. R is exact since the 2019 SI redefinition (from the Boltzmann and Avogadro constants).