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Arrhenius Equation Calculator

The Arrhenius equation is fundamental in chemical kinetics and describes how reaction rates change with temperature. It shows the exponential effect of temperature on the rate constant. For example, reactions with higher activation energies are more sensitive to temperature changes. This calculator is ideal for estimating reaction behavior in experiments, industry, or academic study. Just make sure temperature is in Kelvin and activation energy in J/mol for correct results.

Calculate Reaction Rate Constant Using Arrhenius Equation

Input Fields
kJ/mol
K
If enabled, the result will update automatically when you change any value.

Arrhenius Equation Formula

Formula
$$k = A \cdot e^{-E_a / (R \cdot T)}$$

Where:

  • $$k$$ = rate constant
  • $$A$$ = pre-exponential factor (frequency of collisions)
  • $$R$$ = universal gas constant (8.314 J/molยทK)
  • $$T$$ = temperature in Kelvin

This formula explains how the rate of a chemical reaction increases with temperature due to more molecules having sufficient energy to overcome the activation barrier.


The Arrhenius equation is fundamental in chemical kinetics and describes how reaction rates change with temperature. It shows the exponential effect of temperature on the rate constant. For example, reactions with higher activation energies are more sensitive to temperature changes. This calculator is ideal for estimating reaction behavior in experiments, industry, or academic study. Just make sure temperature is in Kelvin and activation energy in J/mol for correct results

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