Age Calculator
Find an exact age in years, months and days — plus total days lived and the countdown to the next birthday.
What this age calculator does
Enter a date of birth and the calculator returns the exact age in years, months and days — the same way ages are stated on official forms. It also shows the total number of days lived and a countdown to the next birthday. Because everything is computed from real calendar dates, leap years, 30- and 31-day months and February are all handled correctly.
Common uses
- Filling in visa, exam or insurance forms that require age on a specific date.
- Checking eligibility ages for school enrolment, retirement or age-limited services.
- Working out an exact age difference between two people (run it once for each birth date).
Dates never leave your device — the calculation happens entirely in your browser.
Frequently asked questions
How is exact age calculated?
Age is measured as completed calendar years, then completed months, then remaining days between your date of birth and the target date. Leap years and different month lengths are handled automatically.
Does the calculator account for leap years?
Yes. Because it works with real calendar dates rather than an average year length, February 29 birthdays and leap years are counted correctly.
Can I calculate age at a date in the past or future?
Yes — set the "Age as of" field to any date. This is handy for forms that ask for your age on a specific date, such as exam registrations or visa applications.
Why do different calculators sometimes show a different number of months or days?
There is more than one convention for borrowing days from months of different lengths. This tool uses the most common convention: days are borrowed from the month immediately before the target date.