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Activation Energy Arrhenius Calculator

Ea = −R · ln(k2/k1) / (1/T2 − 1/T1) — from two rate constants.

Calculates activation energy using the Arrhenius equation from two rate constants measured at two temperatures.

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

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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)

In depth

Calculates activation energy using the Arrhenius equation from two rate constants measured at two temperatures.