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Activation Energy (Two-Temperature) Calculator

Ea from rate constants at two temperatures.

Compute the activation energy Ea from rate constants k₁ and k₂ measured at temperatures T₁ and T₂ using the integrated Arrhenius equation.

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

Inputs

K
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

Ea = R · ln(k₂ / k₁) / (1/T₁ − 1/T₂) (J/mol, with R = 8.314)

In depth

Compute the activation energy Ea from rate constants k₁ and k₂ measured at temperatures T₁ and T₂ using the integrated Arrhenius equation.