Enter a date of birth to get the exact age in years, months and days, the total months, weeks, days, hours and minutes lived, the weekday you were born on and the days left until your next birthday. Change the second date to find age on a specific date, for example a job application deadline.
How to calculate age
- Enter the date of birth.
- Leave “Age on this date” as today, or change it to a deadline or another date.
- Read the exact age and the totals.
How exact age is calculated
The calculator counts complete years, then complete months, then the remaining days, borrowing the number of days from the previous calendar month when needed. This is the same method used for official documents, so someone born on 31 January is one month old on 28 or 29 February.
Age limits for jobs and admissions
Many job adverts (including government posts) and admissions set an age limit “as on” the closing date. Enter that closing date in the second field to check your age on that day.
Leap-year birthdays
For people born on 29 February, the next birthday in non-leap years is shown as 1 March, which is how most legal systems count it.
Frequently asked questions
How do I calculate my age in days?
Enter your date of birth. Total days lived appears in the results.
Can I calculate age on a future date?
Yes. Set the second date to any future date.
Is my date of birth stored?
No. The calculation happens in your browser and nothing is saved or sent.
Updated October 2026 · Built and tested by Sharjeel Tahir · How our tools are tested