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

Variables:

- 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.

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

## Frequently Asked Questions

**What is FAR in Equal Error Rate calculations?**

FAR stands for False Acceptance Rate. It is a measure of the likelihood that a security system will incorrectly accept an access attempt by an unauthorized user.

**What does FRR stand for?**

FRR stands for False Rejection Rate. It is the probability that a system will wrongly reject an access attempt by an authorized user.

**Why is the Equal Error Rate (EER) important?**

EER is crucial because it provides a single metric that balances the trade-offs between FAR and FRR, giving a holistic view of a system’s security and usability performance.

**Can Equal Error Rate be used for all types of security systems?**

Yes, EER is a versatile metric that can be applied to any security system requiring identity verification, such as biometric systems, password systems, and electronic access controls.