Combined Gas Law Calculator

Solve P₁V₁/T₁ = P₂V₂/T₂ (Boyle's, Charles's and Gay-Lussac's laws) for the missing value.

How to use the Combined Gas Law Calculator

Fill in what you know of: P₁, V₁, T₁, P₂, V₂, T₂ — leave the unknown empty.
The results (P₁, V₁, T₁, P₂, V₂, T₂) are calculated instantly as you type.
Use “Copy link” to share the calculation with the same input values.

Formula

P₁V₁/T₁ = P₂V₂/T₂

About this tool

Temperatures must be absolute (kelvin).