Age Difference Calculator

Compare any two birth dates to get the precise gap between them — useful for siblings, partners and friends born on different days.

first date of birth
second date of birth

Enter two dates of birth to compare.

Other age tools

Compare any two birth dates to get the precise gap between them — useful for siblings, partners and friends born on different days. For your exact age in years, months and days use the age calculator. Related tools: date calculator, time calculator, day of the week, event countdowns.

Subtract the earlier date of birth from the later one. The result is expressed as whole years, months and days, with the total in days and weeks.

The one with the earlier date of birth. The calculator labels the older and younger dates so the difference is clear.

Yes. If the dates match, the difference is zero — the two people are exactly the same age.