Age Calculator
Find your exact age in years, months and days and when your next birthday is.
How to use Age Calculator
- Select your date of birth using the date picker.
- The calculator shows your exact age in years, months and days immediately.
- Scroll down to see total days, weeks, hours and the countdown to your next birthday.
About Age Calculator
The Age Calculator works out how much time has passed between two dates using calendar rules for months and years. It handles leap years and month-length differences so the result matches the way people normally say their age.
All arithmetic is done by your browser using your device clock. Nothing you enter is sent to a server.
Features
- Years, months and days with correct calendar arithmetic
- Total days, weeks and hours lived
- Next birthday date and days remaining
- Works for any valid date of birth up to today
Frequently asked questions
Why does the month/day figure differ from a simple days‑divided‑by‑30 result?
Months have different lengths and leap years add an extra day every four years. The calculator follows real calendar rules instead of rounding.
Does it work for birthdays on 29 February?
Yes. In non-leap years your age is still counted correctly from the anniversary date in the current month.
Is my date of birth stored?
No. The date never leaves your browser, and the result is recomputed on this device every time.
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