About the Gay-Lussac's Law Calculator
Gay-Lussac's law P₁/T₁ = P₂/T₂ — pressure and temperature at constant volume.
Also known as: pressure temperature law, p1/t1 = p2/t2, gay lussac, isochoric process.
How to use this calculator
- Enter solve for and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
P₁ / T₁ = P₂ / T₂ (temperatures in kelvin)
Worked example
Using the values pre-filled in the calculator above:
- Solve for: Final pressure
- Initial pressure = 101.3 kPa
- Initial temperature = 293.15 K
- Final temperature = 347.3 K
the calculator returns:
- Final pressure: 120.0119 kPa
- Initial pressure: 101.3 kPa
- Initial temperature: 293.15 K
- Final temperature: 347.3 K