Ideal Gas Law Calculator

Solve for pressure, volume, moles or temperature with PV = nRT.

Quick answer: Ideal Gas Law Calculator: Solve for pressure, volume, moles or temperature with PV = nRT. Everything runs in your browser, so nothing you enter is uploaded or stored.

Pressure (kPa), 0 if unknown

Volume (L), 0 if unknown

Moles, 0 if unknown

Temperature (K), 0 if unknown

How to use Ideal Gas Law Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

Formula

PV = nRT.

Worked example

At 101.325 kPa and 273.15 K, 22.4 L holds about 1 mole of gas.

Frequently asked questions

What is the formula?

PV = nRT with R = 8.314 J/(mol K).

What units are used?

Pressure in pascals, volume in cubic metres, temperature in kelvin.

Is the Ideal Gas Law Calculator free?

Yes. It is free, needs no signup and works on any device.