Age Calculator

Calculate completed years of age and elapsed days between a date of birth and a chosen date.

Date of birthEnd date

Result

26 years (9,793 days)

How age calculator works

Completed years are the year difference, reduced by one when the birthday has not yet occurred in the end year.

Enter your values or text in the tool form.
Review the result as you change the inputs, or select the action button for code tools.
Copy the result or download it where a download option is available.

A person born on 2000-01-01 is 26 completed years old on 2026-10-24.

The birth date must not be after the end date. Official age rules, including leap-day birthdays, may differ by jurisdiction.

How does age calculator work?

Completed years are the year difference, reduced by one when the birthday has not yet occurred in the end year.

What should I check before using the result?

The birth date must not be after the end date. Official age rules, including leap-day birthdays, may differ by jurisdiction.

Is Age Calculator free to use?

Yes. Age Calculator is free, browser-based, and does not require signup.

Does this tool save my data?

Tool inputs are processed on your device. File tools do not upload your files. Website analytics are described in the privacy policy.

Can I use it on mobile?

Yes. The page is responsive and works on modern mobile, tablet, and desktop browsers.

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Reviewed 2026-10-24. By Mahad and Mehdi Developers.