Arrhenius Equation Calculator

Calculate rate constants, activation energy using k = A * exp(-Ea/RT)

Calculation Mode

Activation Energy, Ea (kJ/mol)

Pre-exponential Factor, A (s⁻¹)

Temperature (K)

About the Arrhenius Equation

The Arrhenius equation describes how reaction rate constants depend on temperature. Higher temperatures increase the rate constant exponentially because more molecules have sufficient energy to overcome the activation barrier.

k = A × e^(-Ea/RT) where R = 8.314 J/(mol·K)

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Editorial Note

MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Chemistry: The Central Science

by Brown, LeMay, Bursten

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.