FREE ONLINE CALCULATOR

Birthday Countdown Calculator

See how many days until your next birthday and which weekday it falls on.

Calculate instantly

How does this calculator work?

Enter your date of birth. DateRuler uses your device’s current calendar date to find the next birthday, your age, and the weekday on which your birthday falls. A birthday happening today shows a celebratory result.

Quick example

If your birthday is November 15 and today is November 1, your birthday is 14 calendar days away.

Frequently asked questions

What if I was born on February 29?

For non-leap years, this tool uses February 28 as the anniversary. Other personal and legal conventions may differ.

Does this send my birthday anywhere?

No. Normal calculations run in your browser. If you deliberately share a link, its date parameters can be included in the URL.