Arrhenius Equation Calculator
Result
Arrhenius Equation Calculator Calculate the rate constant k of a chemical reaction with the Arrhenius equation, k = A · exp(−Eₐ ⁄ (R·T)). Enter the pre-exponential factor A, the activation energy Eₐ in kJ/mol, and the absolute temperature T in kelvin. The — free online calculator.
Formula
- Arrhenius Equation Calculator calculates its result from A, Ea, Rate (decimal), Time. It uses the formula k = A x exp(-Ea / (R x T)). Change any input to recalculate the result instantly.
- The main inputs are Pre-exponential factor A, Activation energy Ea, Temperature T. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Arrhenius Equation
- Pre-exponential factor A: 10000000000
- Activation energy Ea: 50 kJ/mol
- Temperature T: 298 K
Using A = 2, Ea = 3, Rate (decimal) = 0.05, Time = 5, the calculated result is 0.0000122884.
Sample result: Calculating…
Frequently asked questions
What does the Arrhenius Equation calculate?
Arrhenius Equation Calculator Calculate the rate constant k of a chemical reaction with the Arrhenius equation, k = A · exp(−Eₐ ⁄ (R·T)). Enter the pre-exponential factor A, the activation energy Eₐ in kJ/mol, and the absolute temperature T in kelvin. The — free online calculator.
Which values should I enter?
Enter Pre-exponential factor A, Activation energy Ea, Temperature T using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: k = A x exp(-Ea / (R x T)).
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.