How old was my relative when I was born?
Enter two birth dates in any order to see the exact age gap - down to the year, month, and day - and each person's current age.
Ready to compare two birth dates?
Enter two dates of birth to see the exact generational age gap.
Frequently asked questions
How is the age calculated?
The calculator finds the exact calendar age of the older person on the younger person's date of birth, accounting for leap years and the real number of days in each month - not a simple 365-day average.
Does it matter which date I enter first?
No. The calculator automatically figures out which date is earlier, so you can enter the two dates in either order.
Can I use this for any two people, not just family?
Yes - it works for any two dates of birth, whether you're comparing relatives, friends, or historical figures.
Is my date of birth stored?
The result is calculated locally in your browser. The details you submit may be logged to help us understand how the tool is used, but they are never shared publicly or tied to your identity unless you are signed in.