Free Online Age Calculator
Enter your date of birth to see your exact age in years, months, and days. Optionally pick another date to answer “how old was I on…?” for school forms, visas, or milestones.
Use the date picker or dropdowns for your birth date. Optionally calculate age as of another day—not only today.
How this age calculator works
We count complete years from your birth date to the target date, then the remaining months, then days. Leap years and February 29 are included in the day count.
Results also show total days lived, your next birthday, and the weekday you were born. Dates use the calendar values you enter—confirm local rules if you need legal age at midnight in a specific timezone.
How to use this calculator
- Enter your date of birth using the date picker or month/day/year dropdowns.
- Leave the target date as today, or check “Calculate age on a specific date” to pick another day.
- Click Calculate to see years, months, days, and extra details like total days and next birthday.
- Use Clear to reset and try another birth date or target date.
Worked examples
Sample numbers you can try in the calculator above. Your lender's quote may differ slightly.
Age today
The calculator updates automatically based on the current date you use as “today.”
Born 15 March 1990 · target date today
Age: About 36 years (varies by today's date)
Age on a deadline
Useful when a form asks how old you will be on the first day of school or a program start date.
Born 1 Jan 2008 · as of 1 Sep 2026
Age: 18 years, 8 months (for eligibility checks)
Leap-year birthday
Leap-day births are supported; the tool counts calendar days between the dates you choose.
Born 29 Feb 2000
Age: Handled in the day count between dates
Total days lived
Helpful for fun facts, anniversaries, or comparing how many days between two life events.
Any valid birth date
Age: Shows years/months/days plus total days
Frequently asked questions about the age Calculator
How is age calculated?
We count full years first, then remaining months, then days between your birth date and the target date.
Are leap years included?
Yes. February 29 and leap years are part of the underlying day count.
Can I use a future date?
Yes. Pick a future “as of” date to see how old you will be on an event or application deadline.
Is this the same as legal age everywhere?
This tool uses calendar dates only. Some laws count age at midnight local time or the day before a birthday—check official rules when it matters.