basic

Gay-Lussac's Law Two-State Calculator

P₁ / T₁ = P₂ / T₂ at constant volume.

Apply Gay-Lussac's law to a fixed amount of gas at constant volume — compute the unknown variable (P₁, T₁, P₂, or T₂) from the other three. Temperatures must be in kelvin (the calculator converts °C → K automatically).

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

Inputs

atm
°C
°C

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

P₁ / T₁ = P₂ / T₂ (T in K).

In depth

Apply Gay-Lussac's law to a fixed amount of gas at constant volume — compute the unknown variable (P₁, T₁, P₂, or T₂) from the other three. Temperatures must be in kelvin (the calculator converts °C → K automatically).