Age Calculator
Last updated: May 3, 2026Find your exact age in years, months and days.
Age Calculator is a free online calculator to find your exact age in years, months and days. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Age Calculator
This age calculator finds your exact age from a date of birth, broken down into years, months and days, plus totals like weeks, days and hours lived. It counts the real number of days between two dates, accounting for leap years and varying month lengths. Students, HR teams and anyone checking eligibility for forms or benefits use it for a precise answer.
Read the full guide: How to Calculate Your Age in Years, Months and Days
- 1Enter your date of birth using the date picker.
- 2Leave the second date as today, or set a custom target date to age up to.
- 3Read your exact age in years, months and days along with total weeks, days and hours.
Exact, not rounded
It reports full years, leftover months and remaining days instead of a single rounded number.
Leap-year accurate
The day count respects leap years and different month lengths so February dates stay correct.
Any reference date
Calculate age as of a future deadline or a past event, not just today.
Age Calculator — frequently asked questions
How is age in months and days worked out?
It subtracts the birth date from the target date calendar-style: full years first, then full months, then the remaining days. When the day-of-month would go negative it borrows the actual number of days from the previous month, so the result matches how people count birthdays.
Does it handle leap years correctly?
Yes. The total-days figure is the true difference between the two dates, including every February 29 in the range. This is why total days divided by 365 may differ slightly from the years-months-days breakdown.
Is my date of birth sent anywhere?
No. The entire calculation runs in your browser, so nothing is uploaded or stored. It is free and needs no sign-up.
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