The Birthday Countdown Calculator shows a live countdown to your next birthday — days, hours, minutes and seconds — plus the exact date, the weekday it lands on, and the age you’ll turn. It’s the instant answer to “how many days until my birthday?” and runs entirely in your browser.
Automatic year roll-over
Enter your date of birth and the tool finds your next birthday: if this year’s has already passed, it counts down to next year’s automatically. The seconds tick down in real time while the page is open, using your device’s clock.
What it tells you
- Live countdown — days, hours, minutes and seconds remaining
- Exact date — the full calendar date of your next birthday
- Weekday — which day of the week it falls on (handy for party planning)
- Age you’ll turn — calculated from your birth year
Everything is calculated locally in your browser, so your date of birth is never uploaded or stored.