CalcKit

Age Calculator

Calculate age in years, months and days from a date of birth.

Enter your values

Enter the calendar date you were born.

Defaults to today; choose another date if needed.

Result

Age26 years, 3 months, 18 days
Full years
26
Total days lived
9,606

Age counts complete calendar years and months, then remaining days. Dates are treated as calendar days, so daylight-saving changes do not affect the calculation.

Calculated in your browser. Share links include the values you choose to share.

Formula

Subtract birth date from comparison date; count complete calendar anniversaries, then months and remaining days.

Worked example

Born June 15, 2000; calculate age on October 2, 2026.

Age is 26 years, 3 months and 17 days, or 9,605 elapsed days.

How to use

  1. Enter your date of birth.
  2. Choose today or another comparison date.
  3. Calculate your calendar age and elapsed days.

Related calculators

Date DifferenceCount the days, weeks and hours between two dates.PercentageFind a percentage of any number, from small amounts to large totals.

Frequently asked questions

How are February 29 birthdays treated?

In a non-leap year, this calculator uses February 28 as the anniversary. Legal age conventions can differ by jurisdiction.

Are time zones or birth times included?

No. It compares calendar dates without time of day. The result is not an exact age in hours or seconds.