Enter the reaction rate constant, the energy of activation (J), and the temperature (K) into the Frequency Factor Calculator. The calculator will evaluate the Frequency Factor. 

Frequency Factor Formula

The following formula is used to calculate the Frequency Factor. 

FF = K / (e^{(-Ea/(R*T))})


  • FF is the Frequency Factor ( )
  • K is the reaction rate constant 
  • Ea is the energy of activation (J) 
  • T is the temperature (K) 

How to Calculate Frequency Factor?

The following steps outline how to calculate the Frequency Factor.

  1. First, determine the reaction rate constant.
  2. Next, determine the energy of activation (J). 
  3. Next, determine the temperature (K). 
  4. Next, gather the formula from above = FF = K / (e^(-Ea/(R*T))).
  5. Finally, calculate the Frequency Factor.
  6. After inserting the variables and calculating the result, check your answer with the calculator above. 

Example Problem:

Use the following variables as an example problem to test your knowledge.

reaction rate constant = 148

energy of activation (J) = 541

temperature (K) = 512FF = K / (e^(-Ea/(R*T))) =  ?