Browser utility · No upload
Age Calculator
Calculate exact age and the days until the next birthday — free, private, and instant.
Runs locally in your browser — your input is never uploaded or stored.
About this tool
Age Calculator lets you calculate exact age and the days until the next birthday without installing an app or creating an account. See years, months, days, Western zodiac, and Chinese zodiac from one birth date.
Find someone's precise age in years, months, and days, count down to the next birthday, and see their zodiac signs from a single date of birth.
How it works
- Enter or choose your values
- Review the instant result
- Copy or download the result
Frequently asked questions
How do I use Age Calculator?
Enter or choose your input in the tool above. The result updates immediately or appears when you select the action, ready to copy or download.
Does it account for leap years?
Yes. The calculation uses real calendar dates, so leap years and differing month lengths are handled correctly.
Is Age Calculator free, and is my data private?
Yes. Age Calculator is free with no account or watermark, and it runs entirely in your browser so your input is never uploaded, stored, or shared.
Does it work on phones and tablets?
Yes. It works in current browsers on Android, iPhone, iPad, Windows, macOS, and Linux.