Ideal gas law calculator

Solve PV = nRT for the missing variable — pressure, volume, moles or temperature — in common units.

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PV = nRT with R = 8.31446261815324 J/(mol·K). P 1e-9–1e+12 Pa, V 1e-12–1e+9 m³, n 1e-9–1e+12 mol, T above 0 K up to 1e+6 K. Real gases deviate at high pressure or low temperature — this is the ideal-gas approximation.

How to use

  1. Fill any three of P, V, n, T.
  2. Leave the unknown field empty.
  3. Read the solved value in its unit.

What it supports

R = 8.314462618 J/(mol·K). P 1e-9–1e12 Pa, V 1e-12–1e9 m³, n 1e-9–1e12 mol, T 0.001–1e6 K. The ideal-gas approximation deviates at high pressure or low temperature.

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