Age calculator online by date of birth
Enter your date of birth to calculate age in years, months and days (DOB → today).
Example
If your DOB is 2000-01-01 and today is 2026-02-14, the calculator will show your age in years/months/days.
FAQ
How does the age calculator work?
It computes the difference between DOB and the “as of” date in calendar years, months and days.
Can I calculate age as of a past date?
Yes. Change the “as of date” to any date.
What is an age calculator?
An age calculator converts your date of birth (DOB) into an exact age as of a selected date. Instead of only showing years, a good calculator also shows months and days, which is useful for forms, school admissions, jobs, insurance, and official documentation.
How to calculate age from date of birth
Age is a calendar difference. The usual method is to count full years first, then full months, then remaining days. This avoids common mistakes that happen when people divide total days by 365. If you choose a different “as of” date, the result updates instantly.
Why use this online age calculator?
It’s fast, works on mobile, and shows a clear breakdown: years, months, days. It also shows the total number of days and a next-birthday countdown, which users often search for.