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Volume of an Ideal Gas at Non-STP Conditions Calculator

V₂ = V₁ · (P₁/P₂) · (T₂/T₁) — combined gas law.

Compute the volume of an ideal gas at a target pressure and temperature given its volume at a reference state, using the combined gas law: P₁V₁/T₁ = P₂V₂/T₂. Reports V₂ in litres and m³, plus the molar volume at the new conditions if moles are known via PV=nRT.

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

Inputs

L
atm
K
atm
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

V₂ = V₁ · (P₁/P₂) · (T₂/T₁).

In depth

Compute the volume of an ideal gas at a target pressure and temperature given its volume at a reference state, using the combined gas law: P₁V₁/T₁ = P₂V₂/T₂. Reports V₂ in litres and m³, plus the molar volume at the new conditions if moles are known via PV=nRT.