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Activation Energy from Arrhenius Equation Calculator

Ea = R·T₁T₂·ln(k₂/k₁)/(T₂−T₁) — from two rate constants.

Calculates activation energy Ea using the Arrhenius equation at two temperatures: Ea = R·ln(k₂/k₁) / (1/T₁ − 1/T₂). Also computes the pre-exponential factor A.

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

Inputs

K
K

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 Ea using the Arrhenius equation at two temperatures: Ea = R·ln(k₂/k₁) / (1/T₁ − 1/T₂). Also computes the pre-exponential factor A.