Calculate exact age in years, months, days from date of birth
An Age Calculator calculates accurate intervals between two dates, listing elapsed years, months, weeks, days, and countdowns to birthdays.
Enter your date of birth and the tool subtracts it from today, borrowing days and months where needed. For example, someone born on 15 August 2000 is 26 years, 1 month and 11 days old on 26 September 2026. The tool also shows total days, weeks, months and hours lived.
Yes. Change the reference date field to any date on or after the date of birth, such as an exam cut-off, a job application deadline or a school admission date. The birth date cannot be later than the reference date, or the tool shows a validation message.
It counts whole calendar years first, then whole months, then leftover days. If the reference day of the month is earlier than the birth day, it borrows one month and adds the number of days in the month before the reference date. Check your form or rulebook if it defines age differently.
The result panel shows a countdown in days to your next birthday and the weekday it falls on, based on the reference date. If the reference date is your birthday, it is marked as today. Birthdays are matched by month and day, so the year of birth does not affect the countdown.
Total days lived is the number of whole days between your date of birth and the reference date, with both set to midnight. Weeks are that figure divided by 7 and rounded down. Hours are total days times 24, so they count complete days only, not the time of day you were born.
Age in years is only the completed years, such as 26. Exact age adds the extra months and days, such as 26 years, 1 month, 11 days. Exact age matters for age-limit eligibility rules, where a cut-off date decides whether you qualify. Check the official rule for the exact reference date.
No. Toolskyt operates under a zero-server policy. All calculations, data formatting, and file exports are executed locally on your machine.
No, this tool is 100% free. There are no limits, sign-ups, subscriptions, or hidden charges required.