How to use the Age Difference Calculator
- Enter the first person's date of birth.
- Enter the second person's date of birth.
- Press Find age difference.
Age Difference Calculator formula
Age gap = Later date of birth − Earlier date of birth, counted in full years, then months, then days.
Worked example
Born 12 June 1995 and 3 March 1998: the gap is 2 years 8 months 19 days.
Frequently asked questions
How do I calculate the age difference between two people?
Subtract the earlier birth date from the later one in years, months and days, or enter both dates above.
Does the order of dates matter?
No. The calculator always finds who is older automatically.
Is the result exact?
Yes. It uses real calendar months and leap years.
Can I use this for siblings or couples?
Yes, for any two people or any two dates.
Is my data stored?
No. Everything is calculated in your browser.