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Age Calculator

Real-time Engine

Enter a birth date and an optional calculation date to find age in years, months and days.

Calculate age on a date

Leave blank to use today.

Result

Enter a birth date, then calculate.

Day CounterCount elapsed or inclusive days between dates, or add and subtract calendar days.Date CalculatorAdd or subtract days, weeks, months, or years from any calendar date.Days Until CalculatorCount the calendar days from today until a future date.
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How age is calculated

Age is measured in completed calendar years, then completed calendar months, then remaining days. This avoids treating every month or year as a fixed number of days.

Age calculation example

Someone born July 15, 2000 is 25 years old on July 14, 2026 and turns 26 on July 15, 2026.

What to know

  • The calculation date defaults to your local date today.
  • February 29 birthdays use valid calendar-date handling in non-leap years.

Frequently Asked Questions

Can I calculate age on a past date?

Yes. Set the calculation date to any date on or after the birth date.

Does the tool show total days?

Yes. It shows both calendar age and total elapsed days.

Found a problem with this calculator? Report an issue.