Calculate the exact age difference between two people
The Age Difference Calculator compares two complete dates of birth to identify who is older and measure the age gap in calendar years, months and days. Using full dates is more accurate than comparing birth years alone because birthdays can fall at different points in the year.
Use it for siblings, friends, coworkers or any two people when you want to know the exact difference in age, who is older, or the total number of days between birthdays.
Gregorian and Hijri age-gap calculations
You can compare Gregorian or Hijri birth dates. Hijri calculations use Umm al-Qura as the reference calendar. For partner-specific searches such as age gap between spouses or couples, use the dedicated couple age-gap page available under Related tools.