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Van der Waals Real Gas Calculator

(P + an²/V²)(V − nb) = nRT — real gas pressure.

Computes the pressure of a real gas using the Van der Waals equation given temperature, volume, and moles with molecule-specific a and b constants.

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

Inputs

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

P = nRT/(V − nb) − an²/V²

In depth

Computes the pressure of a real gas using the Van der Waals equation given temperature, volume, and moles with molecule-specific a and b constants.