Enter the birth year and current year into the calculator to determine the age. This calculator can also evaluate any of the variables given the others are known.

## Reverse Age Formula

The following formula is used to calculate the age based on the birth year.

A = CY - BY

Variables:

- A is the age (years) BY is the birth year (year) CY is the current year (year)

To calculate the age, subtract the birth year from the current year.

## How to Calculate Reverse Age?

The following steps outline how to calculate the Reverse Age using the formula: A = CY – BY.

- First, determine the current year (CY).
- Next, determine the birth year (BY).
- Next, substitute the values of CY and BY into the formula: A = CY – BY.
- Finally, calculate the Reverse Age (A).
- After inserting the values 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.

Current year (CY) = 2022

Birth year (BY) = 1990