Skip to content
M2TOOLKIT

Popular tools

Menu

Ideal Gas Law Calculator

Solve PV = nRT for any variable.

  • Free
  • No sign-up
  • Nothing is sent or stored
mol
K
L

Result

Pressure
101.325 kPa
Amount of gas (n)
1 mol
Temperature (T)
273.15 K
Volume (V)
22.414 L
Temperature in °C
0 °C
Pressure in atm
0.999999 atm
How it was calculated
  1. P = n × R × T ÷ V
  2. R = 8.314462618 L·kPa/(mol·K)
  3. P = 101.32486 kPa
Kelvin = °C + 273.15. Real gases deviate from the ideal gas law at high pressure and low temperature.

The calculation happens instantly in your browser. The numbers you enter are not sent to our servers or saved.

How to use the Ideal Gas Law Calculator

  1. Pick what to solve for.
  2. Enter the other values in kPa, litres, moles and kelvin.
  3. Read the result, with °C and atm conversions.

What does this tool do?

The ideal gas law relates the pressure, volume, amount and temperature of a gas. At 0 °C and 1 atm, one mole of an ideal gas fills about 22.4 litres.

Temperatures must be absolute (kelvin): K = °C + 273.15.

Why use it?

  • Solve for any variable.
  • Convenient lab units.
  • °C and atm shown.

The formula

PV = nRT
R = 8.314 L·kPa/(mol·K)

Accuracy and limits

  • Real gases deviate from ideal behaviour at high pressures and low temperatures.

Privacy

The calculation happens instantly in your browser. The numbers you enter are not sent to our servers or saved. There's no account to create and nothing to install.

Last reviewed by the M2Toolkit team.

Other tools people use alongside the ideal gas law calculator.