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Ideal Gas Law (PV = nRT)

Solve for any of P, V, n, T given the other three. R = 8.314 J/(mol·K).

Inputs

Result

V
22.4127 L
R = 8.314 J/(mol·K) (with P kPa, V L → energy in J).
  • P101.325 kPa
  • V22.4 L
  • n1 mol
  • T273.15 K (0.00 °C)
  • R8.314 J/(mol·K)
  • V solved22.4127 L

Step-by-step

  1. PV = nRT.
  2. Solving for V: 22.4127 L.

How to use this calculator

  • Pick what to solve for.
  • Enter the three known values.
  • Note: T in Kelvin, V in liters, P in kPa.

About this calculator

Ideal gas law: PV = nRT. Holds well for most gases at moderate pressures and temperatures (away from condensation). R = 8.314 J/(mol·K). Note: 22.4 L of any gas at STP (273.15 K, 101.325 kPa) = 1 mole — useful identity. Real gases deviate at high pressure (>10 atm) or low temp (near boiling). For more accuracy, van der Waals or Redlich-Kwong equations.

Frequently asked

Standard Temp + Pressure: 273.15 K (0°C) and 101.325 kPa (1 atm). 1 mol gas = 22.414 L.

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