Ideal gas law calculator

How it works

Enter three of pressure, volume, moles and temperature to find the fourth.

The formula

PV = nRT, with R = 0.08206 L·atm/(mol·K) or 8.314 J/(mol·K). Temperature must be in kelvin (°C + 273.15).

Worked example

1 mol at 273.15 K in 22.4 L: P = 1 × 0.08206 × 273.15 ÷ 22.4 ≈ 1.00 atm.

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