Age Calculator
Find your exact age in years, months, days, weeks and hours — and see how many days until your next birthday.
Free Age Calculator — Exact Age Between Any Two Dates
This age calculator tells you exactly how old you are — or how old anyone or anything is — down to the day. Enter a date of birth and a target date, and instantly see the result broken down into years, months, days, total weeks, total hours, and the day of the week you were born.
📐 Precise Calculation
Accounts for leap years, different month lengths, and day-of-month edge cases.
📅 Any Two Dates
Calculate age between any past or future dates — not just today.
🎂 Birthday Countdown
See exactly how many days remain until the next birthday from your chosen date.
⚡ Instant Result
No server round-trip. Results are calculated immediately in your browser.
Frequently Asked Questions
Years, months, and remaining days are derived by comparing the two dates while correctly handling month-end rollovers and leap years. Total days and weeks are computed from the raw millisecond difference.
Yes — change the "Calculate Age On" field to any date. The tool works for any valid date combination where the target date is on or after the date of birth.
Yes. The calculation uses JavaScript's built-in Date object, which correctly accounts for leap years and varying month lengths.
It shows the day of the week (e.g., Monday, Friday) corresponding to the date of birth you entered.
Yes — completely free, with no account required and no data sent to any server.