Exact age gap between two people in years, months and days.
How the age difference is calculated
The tool counts the full years, months and days between the two birth dates — exactly as a marriage registrar, school admission form or horoscope matching would — and shows the total in days and weeks. It also tells you who is older.
Common uses
- Age gap between partners or between siblings.
- Checking an age-difference rule (for example, a minimum 21/18 age at marriage, or the maximum age gap in some adoption rules).
- Finding how much older a parent is than a child, or the gap between two historical dates.
Want a single person's exact age? Use the age calculator.
Frequently asked questions
How do I calculate the age difference between two people?
Subtract the earlier date of birth from the later one, counting years first, then months, then days. The calculator handles month lengths and leap years for you.
What is an acceptable age gap in a relationship?
There is no legal 'acceptable' gap for adults in India; the law only sets the minimum marriage age (21 for men, 18 for women). The popular 'half your age plus seven' rule is just a social guideline.
Does the calculator consider leap years?
Yes — the difference is computed from real calendar dates, so 29 February and varying month lengths are handled correctly.