Calculate Birth Year From Age

Find the likely birth year or birth date range from an age and reference date.

Why a range is needed

A stated age can usually point to two possible birth years because the birthday may or may not have happened yet in the reference year.

The calculator gives the date range that would make someone the entered age on the reference date.

Use these calculators for everyday date questions, exact age gaps, and reverse age-to-birth-year lookups.

Compare two dates of birth and find the exact calendar age gap.

Find the possible birth date range for a stated age.