Age Calculator Online

Calculate precise age from a birth date to a selected reference date in years, months and days.

What the result includes

The calculator shows completed years, remaining months and days, total elapsed days, the weekday of birth and the time until the next birthday.

When it is useful

Use it for forms, registrations, age checks, anniversaries and planning. Choose a past or future reference date when you do not want to calculate age as of today.

How the calculation works

Calendar months have different lengths, so the years-months-days result is calculated from calendar boundaries rather than by dividing the total number of days.

Privacy

The calculation runs locally in your browser. Entered dates are not sent to the server by this tool.

1. Enter data or choose a file.
2. Set available options.
3. Run the tool.
4. Review and copy or download the result.