Arrhenius Equation

Online calculator to calculate reaction rate constant k of chemical reaction using Arrhenius equation

Calculator of Arrhenius Equation

Frequency Factor (A) sec-1
Activation Energy (Ea) kJ mol-1
Temperature (T) K
Reaction Rate Constant (K) sec-1

Formula of Arrhenius Equation

K = A × e (-Ea / (R×T))


  • K = Rate Constant
  • A = Frequency Factor
  • Ea = Activation Energy
  • R = Universal Gas Constant (8.314 × 10-3 kJ mol-1 K-1)
  • T = Temperature
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