13 · Calculators

Age Calculator

Enter a date of birth to get an exact age in years, months and days, or change the second date to find someone’s age on any day.

Defaults to today. Change it to find an age on any date.

Age

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How to use the age calculator

  1. Pick the date of birth.
  2. Leave Age on as today, or choose another date.
  3. Read the exact age, the totals in months, weeks and days, and the next birthday.

How the age is counted

The calculator counts whole calendar years first, then whole months, then the remaining days. Months have different lengths, so “1 month” from 31 January lands on the last day of February. People born on 29 February have their birthday counted on 28 February in years that aren’t leap years.

Examples

Born 14 June 1995, on 29 October 2026

31 years, 4 months and 15 days

Born 29 February 2000

Next birthday counted on 28 February 2027

Questions

Why do some sites give a different number of days?

Some calculators approximate a month as 30 days. This one uses real calendar months, so results match how age is normally counted.

Does time zone matter?

Dates are compared as calendar days, so time zones and daylight-saving changes don’t affect the result.

Is my birth date saved?

No. It stays in your browser and disappears when you leave the page.