Enter the FAR number and the FRR number into the Calculator. The calculator will evaluate the Equal Error Rate. 

Equal Error Rate Formula

EER = (FAR + FRR) / 2


  • EER is the Equal Error Rate ()
  • FAR is the FAR number
  • FRR is the FRR number

To calculate Equal Error Rate, sum the FAR number and the FRR number, then divide by 2.

How to Calculate Equal Error Rate?

The following steps outline how to calculate the Equal Error Rate.

  1. First, determine the FAR number. 
  2. Next, determine the FRR number. 
  3. Next, gather the formula from above = EER = (FAR + FRR) / 2.
  4. Finally, calculate the Equal Error Rate.
  5. 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.

FAR number = 7945

FRR number = 1293