What is Age Calculator?
Age Calculator computes elapsed years, months and days from a birth date and shows how long remains until the next birthday or anniversary.
How to use
- Enter a birth date or anniversary date.
- Read the exact elapsed years, months and days.
- Check the next anniversary date and days remaining.
Example
Use this sample to confirm what Age Calculator does before pasting your own data.
Input
1990-01-01
Output
Elapsed years plus days until the next anniversary.
When to use it
Use Age Calculator for quick local checks, debugging, documentation prep, and one-off conversions where opening a full IDE or command-line workflow would be slower. For production-critical data, always review the output before committing or shipping it.
Frequently asked questions
How are leap years handled?
The browser calendar handles leap years when adding years and comparing dates.
Can I use it for anniversaries?
Yes. Any start date works, not only birthdays.