Age Gap Calculator

An age gap calculator measures the difference in age between two people precisely — in years, months, and days. It is commonly used for couples, siblings, or parent-child comparisons, as well as genealogical research.

1. 1Subtract the earlier birth date from the later birth date
2. 2Express the result in years (accounting for months and days)
3. 3For exact months: each incomplete month counts as the number of days elapsed