Ideal Gas Law Calculator

Solve PV = nRT for the number of moles.

Pressure (atm)

Volume

Temperature (K)

Amount of gas (mol) 0.9994

Formula: n = PV ÷ (R T), R = 0.082057

Step-by-step with your numbers:

1. Values used:

2. Pressure = 1 atm

3. Volume = 22.4

4. Temperature = 273.15 K

6. Amount of gas = 0.9994mol

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Relate pressure, volume, temperature and amount of an ideal gas.

The math behind it

PV = nRT, so n = PV ÷ (RT) with R = 0.082057 L·atm·mol⁻¹·K⁻¹. Temperature must be in kelvin.

1 atm, 22.4 L, 273.15 K → 1 mol.

Why 22.4 L?

One mole of ideal gas occupies 22.4 L at standard temperature and pressure.