Eyring Equation Calculator

Calculate rate constants and activation parameters using the Eyring equation

Calculation Mode

Temperature (K)

Enthalpy of Activation, dH* (kJ/mol)

Entropy of Activation, dS* (J/mol·K)

Transmission Coefficient (kappa)

About the Eyring Equation

The Eyring equation is derived from transition state theory and relates rate constants to thermodynamic activation parameters. Unlike the Arrhenius equation, it provides insight into both enthalpic and entropic contributions to the activation barrier.

Negative dS* values indicate a more ordered transition state (common in bimolecular reactions), while positive values suggest a looser transition state.