Age Calculator
Find out your exact age today — in years, months and days, not just a rounded number. Type in your birth date and the calendar math happens instantly, privately in your browser.
How it works
Enter your date of birth using the date picker. The tool counts full years first, then the remaining months and days using real month lengths (including leap years), and also shows your total days lived.
Formula and source
Age = today ? birth date on the Gregorian calendar, borrowing days and months exactly like manual date subtraction. Last verified against Gregorian calendar rules on 2026-10-09.
Worked examples
- Born 15 Jan 1990, checked 9 Oct 2026 ? 36y 8m 24d — 13,416 days lived
- Born 29 Feb 2000, checked 28 Feb 2026 ? 25y 11m 30d (leap-day birthdays count normally)
Common mistakes
- Reading the result as months alone: 8m means 8 months after your last birthday, not 8 months old.
- Leap-day babies: 29 Feb birthdays are counted on the real calendar, so results around February can surprise you.
- Time zones: the tool uses calendar dates, not birth times, so a birth near midnight can be off by a day across zones.
Tips
- Use the date picker instead of typing to avoid format mix-ups.
- Bookmark the page — its address never changes.
FAQ
How old am I today?
Enter your birth date above u2014 the tool shows your exact age in years, months and days as of today.
How is age calculated manually?
Subtract the birth year from the current year, then adjust down if this year’s birthday hasn’t happened yet; months and days are borrowed the same way.
Why does my age differ by a day between calculators?
Most differences come from time zones or whether the count starts at midnight u2014 calendar-date calculators like this one ignore the time of day.
Can I get my age in days or months only?
Yes u2014 the total-days figure lets you divide into weeks or months however you like.
Does it handle leap years?
Yes. February lengths follow the Gregorian calendar, including century leap-year rules.
Is my birth date stored anywhere?
No. The calculation runs entirely in your browser.