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Age Calculator

Looking for a exact age calculator in years months and days? This free tool gives you exact age plus total months, weeks, days and hours lived. Just enter your numbers and press Calculate — results are instant.

How to Use This Age Calculator

Your exact age is the span between your birth date and another date, counted in calendar years, months and days — not just total days divided by 365, because leap years and months of different lengths matter. The calculator also totals the same span in months, weeks, days and hours, so you can see, for example, how many days old you are. Pick any end date to find your age on a past or future day.

Formula Used

Age = end date − birth date, counted in calendar years, months and days, with leap years handled by the calendar itself. Totals are the same span counted in months, weeks, days and hours.

Worked Example

Example: Date of birth 15 May 1995 · Age at date 11 November 2026

  1. From 15 May 1995 to 15 May 2026 is 31 years; from 15 May to 11 November 2026 is 5 months and 27 days.
  2. So the age is 31 years, 5 months, 27 days.
  3. The same span is 377 months, 1,643 weeks, 11,503 days, or 276,072 hours.

Age: 31 years, 5 months, 27 days

Frequently Asked Questions

How are leap years handled?

By the calendar itself: the calculator counts real calendar days between the dates, so 29 February is counted when it falls inside the span and ignored when it does not.

Can I find my age on a past or future date?

Yes. Change the 'age at date' field to any date — for example the date of an exam or a trip — and the calculator gives your age on that day.

Why does the total in days matter?

It is the same span counted differently. Saying you are 11,503 days old is just another way of saying 31 years, 5 months and 27 days — useful for milestones and for fun.

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