About this age calculator
A simple and accurate way to calculate age by date of birth with clear results and no sign-up.
What this tool does
The Mi Age Calculator computes exact age in years, months, and days based on calendar date differences. You can calculate age as of today or as of any custom date.
- Instant age calculation from date of birth.
- Custom "as of" date support for past or future reference.
- Next birthday countdown and total days lived.
How accuracy is handled
We use calendar-based calculations rather than rough day estimates. This means month lengths, leap years, and date boundaries are handled correctly.
February 29 birthdays are also supported: in non-leap years the calculation aligns to February 28 for birthday logic.
Privacy and performance
The calculator runs directly in your browser. Personal inputs are not required to create an account, and the page is optimized for a fast, lightweight experience.
Need full details on data handling? Read our Privacy Policy.