Private by design: the dates you select remain in your browser.
Exact age from date of birth
This age calculator finds the calendar difference between a date of birth and a selected date. It reports completed years, remaining months and remaining days instead of estimating age by dividing total days by 365.
How to use the age calculator
- Select the date of birth.
- Keep today's date selected or choose another date.
- Select Calculate my age.
Example
Age for admission, forms and eligibility
You can change the “Calculate age on” date to an admission closing date, examination date or any other reference date. For official eligibility, follow the date and age rules stated by the relevant institution.
Exact age versus total days
Calendar age uses years and months of different lengths. Total days is a separate elapsed-day count that naturally includes leap days within the selected period.
Leap-year birthdays
A person born on February 29 has a real calendar birthday every leap year. For the next-birthday countdown in a non-leap year, this tool uses February 28 as a practical display convention. Legal rules can differ.
Frequently asked questions
How does the age calculator work?
It measures completed calendar years, remaining months and remaining days between the selected dates.
Can I calculate age on a past or future date?
Yes. Choose any calculation date after the date of birth.
Does it show total days and weeks?
Yes. Both values are included in the result.
How is a February 29 birthday handled?
For next-birthday display in a non-leap year, the calculator uses February 28.
Is my date of birth uploaded?
No. It remains in your browser.
Calendar logic and page wording reviewed on July 19, 2026.