World Clock 24

Age Calculator

Find Your Exact Age Down to the Day

How Old Are You — Exactly?

Enter your date of birth and instantly see your precise age in years, months, and days. The calculator also shows your age in total months, weeks, days, and hours lived, plus how many days remain until your next birthday. You can also calculate age as of any past or future date.

0 years old
Exact Age
Total Months
Total Weeks
Total Days
Total Hours
Next Birthday

How Age Calculation Works

Age is calculated using calendar arithmetic rather than simple division. The tool finds the difference in years, months, and days between your birth date and the target date, correctly handling months with different lengths and leap years. For example, if you were born on January 31 and it's March 1, you are 1 month old — not 29 or 30 days.

Fun Age Facts

Frequently Asked Questions

Can I calculate age as of a specific date?

Yes. Use the "Calculate Age As Of" field to enter any date. This is useful for determining age at a past event or a future milestone.

Does it account for leap years?

Yes. The calculator correctly handles February 29 and leap year boundaries when computing total days and weeks.

How is "Next Birthday" calculated?

The tool finds the next occurrence of your birth month and day after the "as of" date. If your birthday is today, it shows the one next year.