🎂 Age Calculator
Your exact age is the calendar difference between today and your date of birth — in years, months and days, not just years. Enter your values below — results update instantly, entirely on your device.
Fill in the fields above — results appear instantly.
How the age calculator works
Age counts completed calendar years, then completed months, then leftover days — borrowing from the previous month/year when the day or month hasn’t been reached yet, exactly like official age reckoning.
Example: Born 2000-03-15, checked on 2026-07-04 → 26 years, 3 months, 19 days.
Forms, visa applications and school admissions often want age "as on" a specific date in years-months-days — this is that computation, done locally on your device (a birthdate is personal data; it never leaves your browser here).
Frequently asked questions
How is age in years, months and days calculated?
Subtract calendar components with borrowing: if today’s day-of-month is before your birth day, borrow the previous month’s length; if the month is earlier, borrow a year. The result matches official age-on-date reckoning.
How many days old am I?
The calculator shows total elapsed days (date difference ÷ 86,400 seconds), alongside total completed months and approximate weeks.
Does it handle leap-year birthdays?
Yes — February 29 birthdays age normally; in non-leap years the completed year ticks over on March 1, consistent with most legal conventions.
Is this age calculator accurate and private?
Yes. It uses the standard published formula, shows its working under every result, and computes locally in your browser — your inputs are never sent to a server, and the page works offline.