Compressibility Factor Calculator

Find how much a real gas deviates from ideal behavior.

Compressibility factor Z 0.9999

Formula: Z = P·V_m ÷ (R·T)

Step-by-step with your numbers:

1. Values used:

2. Pressure = 101,325 Pa

3. Molar volume = 0.0224 m³/mol

4. Temperature = 273 K

6. Compressibility factor Z = 0.9999

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The compressibility factor Z measures a real gas's departure from the ideal gas law.

The math behind it

Z = P·V_m ÷ (R·T). Z = 1 is ideal; Z < 1 means attraction dominates, Z > 1 means repulsion.

Ideal gas at STP → Z ≈ 1.

When does Z stray from 1?

At high pressure or near condensation, where intermolecular forces matter.