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Free Ideal Gas Law
Calculator

Advanced free ideal gas law calculator with PV=nRT solving, optional compressibility factor Z, gas density and mass, sealed-gas state changes, mixtures, STP presets, unit conversion, and local-only processing.

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About Free Ideal Gas Law Calculator

Solve PV = nRT in mixed units, add an optional measured compressibility factor Z, calculate gas density and mass, model a sealed gas state change, or analyze a gas mixture with Dalton’s law.

Workspace options

  • Pressure P
  • Volume V
  • Amount n
  • Temperature T
  • Compressibility factor Z

Available actions

  • ☼ / ◐
  • PV=nRT solver
  • Density & mass
  • Sealed gas state change
  • Gas mixture
  • IUPAC STP · 0 °C · 100 kPa