Age Calculator — Exact Age in Years, Months & Days
About the Age Calculator
This age calculator converts a date of birth into an exact age — not just whole years, but the precise years, months and days elapsed, following calendar rules (including leap years) rather than approximations.
It also reports your age in total days and total weeks, and counts down to your next birthday — handy for forms, insurance quotes, visa applications or simply settling an argument about who is the oldest.
How to use the Age Calculator
- Enter your date of birth.
- Optionally change the “age at date” — it defaults to today — to compute your age at any past or future moment.
- Read the breakdown: years/months/days, totals, and the next-birthday countdown.
Frequently asked questions
How are months counted?
The calculator walks the calendar: full years first, then full calendar months, then leftover days. Someone born on Jan 31 counted on Mar 1 is “1 month and 1 day” old when February has 28 days — the same rule government forms use.
Are leap years handled?
Yes. February 29 birthdays and leap-year spans are computed with the real calendar, so totals in days are exact.
Does it handle future dates?
Yes — set “age at date” in the future to see the age someone will reach on that day, which is useful for school cut-offs and eligibility rules.
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