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Compressibility Factor Z from Real-Gas P, V, n, T Calculator

Z = PV / (nRT) — Z = 1 for ideal gas; Z ≠ 1 for real gases.

Compute the compressibility factor Z = PV / (nRT) for a real gas given pressure (atm), volume (L), moles, and temperature (K). Z = 1 corresponds to ideal-gas behaviour. Z > 1 means the gas is more compressible than ideal (high T, repulsion); Z < 1 means less compressible (high P, attraction).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

atm
L
mol
K

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Z = PV / (nRT); R = 0.08206 L·atm·mol⁻¹·K⁻¹.

In depth

Compute the compressibility factor Z = PV / (nRT) for a real gas given pressure (atm), volume (L), moles, and temperature (K). Z = 1 corresponds to ideal-gas behaviour. Z > 1 means the gas is more compressible than ideal (high T, repulsion); Z < 1 means less compressible (high P, attraction).