Age Calculator: Exact Age in Years, Months and Days

Enter a date of birth to get the exact age in years, months and days, total days lived, and the countdown to the next birthday.

Rules as of 2026.11.11 · calculated with the rates and rules in effect on this date

Date of birth Age at date (blank = today)

How age is calculated

Age goes up by one on each birthday. Between birthdays, the leftover months and days are counted from the most recent birthday. Someone born on March 15, 2000 is 26 years, 7 months and 27 days old on November 11, 2026.

Leap-day birthdays

If you were born on February 29, this calculator treats February 28 as your birthday in non-leap years. Some places legally use March 1 instead, so check local rules for official documents.

Age at a past or future date

Fill in the second date to see someone’s age on a specific day, such as an application deadline or a school start date.

🔗 Add this calculator to your site

Copy the code below and paste it into your page. Free to use; calculations run in the reader’s browser.

<iframe src="https://ilsanggyesan.com/en/tools/age-calculator/embed" title="Age calculator" width="100%" height="720" style="border:0;max-width:760px" loading="lazy"></iframe>
<p><a href="https://ilsanggyesan.com/en/tools/age-calculator/">Age calculator</a> · Calculator by <a href="https://ilsanggyesan.com/en/">Ilsang Calc</a></p>

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