Last updated: April 13, 2026

Arrhenius Equation Calculator

Based on 3 sources
100 people find this calculator helpful

Table of contents

The Arrhenius equation

The Arrhenius equation describes how the rate constant k of a chemical reaction depends on temperature and activation energy:

k = A × e^(−Ea / RT)
  • k = rate constant
  • A = pre-exponential factor (frequency factor)
  • Ea = activation energy (J/mol)
  • R = 8.314 J/(mol·K)
  • T = absolute temperature (K)
Frequency factor — units same as k (s⁻¹ for first-order).

Did we solve your problem today?