Birthday Calculator

Birthday Calculator is a simple, fun Chrome extension that instantly calculates everything about your birthday — no login, no permissions, and completely free. Just enter your date of birth and click "Light the candle": - EXACT AGE: Get your precise age in years, months, and days - TOTAL DAYS LIVED: See exactly how many days you've been alive - NEXT BIRTHDAY COUNTDOWN: Find out how many days are left until your next birthday, along with the exact date - DAY YOU WERE BORN: Discover which day of the week you were born on - ZODIAC SIGN: Your zodiac sign is calculated automatically from your date of birth - FUN ANIMATION: Enjoy a candle-lighting and confetti effect with every calculation The extension is lightweight, requires no internet connection or account, and collects no personal data — everything is calculated locally inside your browser, on the spot. Whether you want to check your own age, plan a friend's birthday, or just find out your zodiac sign, Birthday Calculator is one click away.