Age Difference Calculator

Calculate exact age difference between two people.

How It Works

  1. Enter two birth dates. Person 1 and Person 2 birth dates.
  2. Age gap. See the difference in years and months between the two people.
  3. Compare on a date. Calculate exact ages on any reference date.
  4. Detailed breakdown. Full years, months, days plus zodiac and birth facts.
  5. Milestones. Birthday countdowns and the double-age milestone.

Also try our Half Birthday Calculator or Birthday Rarity Calculator.

Enter values to see results.

Formula & Reference

Gap = calendar difference between birth dates
Ages computed on compare date