How do I calculate the age difference between two people?
Enter both dates of birth, choose Gregorian or Hijri, then calculate to see the exact gap in years, months and days.
Age Difference Calculator
Age Difference Calculator | Gregorian & Hijri
Calculate the exact age difference between two people in years, months and days. Enter both birth dates and choose Gregorian or Hijri.
Enter both dates of birth
When Hijri is selected, calculations use Umm al-Qura; some dates can differ by one day from other Hijri calendar systems.
Calculate the age difference between two people accurately
The Age Difference Calculator compares two complete dates of birth and shows the exact gap in years, months and days. It also identifies who is older.
It is useful for comparing your age with a relative, friend or anyone else when you want more than a rough difference in years.
If you are comparing spouses specifically, use the Age Gap Between Couples page for a relationship-focused version of the same date comparison.
Gregorian or Hijri age difference
Choose the calendar that matches the dates available to you. Gregorian calculations use actual Gregorian month lengths and leap years, while Hijri input uses Umm al-Qura.
Enter both birth dates carefully, then calculate to see the difference in completed years, months and days using the selected calendar.
How is the difference between two birth dates calculated?
The calculator compares the earlier birth date with the later one and measures the actual calendar interval between them in completed years, months and days.
Manual subtraction can become confusing around leap years and months with different lengths, so the calculator handles those calendar boundaries for you.
When both dates of birth are identical, the exact age difference is zero years, zero months and zero days.
Frequently asked questions about age difference
Can I calculate the age difference in Gregorian and Hijri calendars?
Yes. Choose the calendar that matches the dates you have. Hijri input uses Umm al-Qura as the reference.
How do I know who is older?
The calculator compares the two dates of birth and identifies the older person together with the exact age gap.
Do leap years and different month lengths affect the result?
Yes. Exact date differences depend on real month lengths and leap years, which the calculator takes into account.