Birthday Calculator
Discover birth facts, elements, zodiac animals, and track a ticking real-time countdown to your next birthday.
Select Your Birthdate
Birth Day of the Week
You were born on a Sunday!
Countdown to Next Birthday:
What is the Birthday Calculator?
The Birthday Calculator does far more than just tell you how old you are. It computes your exact chronological age in years, months, and days, determines your astrological sign, and tells you exactly how many days are left until your next birthday.
How It Works (Algorithm)
The tool queries your device for the current local date and time. It subtracts your Date of Birth from today's date. If the current month and day are chronologically *before* your birth month and day, the algorithm subtracts one full year from your age tally to ensure precision.
$$ \text{Age} = \text{Current Year} - \text{Birth Year} \; (-1 \text{ if Birthday pending}) $$
The logical adjustment required for mid-year calculations.
How to Use It
Simply enter your Date of Birth using the calendar dropdowns. Click calculate, and the tool will reveal your exact age, your total time alive in hours and seconds, and a countdown timer to your next party.