Age Calculator
Find the exact age in years, months, and days — plus totals and the countdown to the next birthday.
Dates are processed locally in your browser and never uploaded.
What is age calculator?
Enter a date of birth to get the exact age in years, months, and days, using real calendar arithmetic — month lengths and leap years included. Optionally pick a target date to compute the age at that moment instead of today.
Totals in months, weeks, and days plus a countdown to the next birthday make it handy for forms, milestones, and curiosity alike.
How to use it
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Pick the date of birth
The age at today’s date appears immediately.
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Optionally set a target date
See the age as of any other date, past or future.
Examples
A birthday mid-year
Born 15 Jan 1990, age on 20 Jun 2026.
1990-01-15 → 2026-06-20
Result: 36 years, 5 months, 5 days
Frequently asked questions
By calendar months: from the 15th of one month to the 14th of the next is one month minus one day. When the day of month has not yet arrived, days borrow from the previous month’s real length.
Yes. All math uses real calendar dates, so February 29 and leap years are accounted for automatically.