Ideal Gas Law Calculator

Enter any three ideal-gas variables and solve the fourth with common pressure, volume, and temperature units.

Solve for

Pressure

Volume

Moles / temperature

—PV = nRT · R = 8.314462618 J/(mol·K)

How to use this Ideal Gas Law Calculator

Solve pressure, volume, moles, or temperature with PV = nRT. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.