Last updated: March 2026
What Is the Birthday Calculator?
The Birthday Calculator is your all-in-one birthday companion. Enter your date of birth and instantly see a live countdown to your next birthday, your exact age down to the second, and a wealth of fascinating birth-related facts. Discover your zodiac sign, Chinese zodiac animal, birthstone, birth flower, and which famous people were born on the same day as you.
Whether you're planning a birthday party and need to know the day of the week, or just curious about your birthday stats, this calculator has everything you need — completely free, with no signup required.
Frequently Asked Questions
How many days until my birthday?
Enter your birth date above and the calculator will show you a live countdown of exactly how many days remain until your next birthday, along with the day of the week it falls on and the age you'll be turning.
Who shares my birthday?
The calculator includes a database of famous people born on every day of the year. After entering your birth date, scroll to the Fun Facts section to see which celebrities, athletes, musicians, and historical figures share your birthday.
What is my zodiac sign?
Your zodiac sign is determined by your birth date. The calculator automatically displays your Western zodiac sign with its date range, as well as your Chinese zodiac animal and element based on your birth year.
What is my birthstone?
Each month of the year has an associated birthstone: January (Garnet), February (Amethyst), March (Aquamarine), April (Diamond), May (Emerald), June (Pearl), July (Ruby), August (Peridot), September (Sapphire), October (Opal), November (Topaz), December (Tanzanite).
Can I compare two birthdays?
Yes! Use the Compare Ages toggle to enter a second birth date. The calculator will show the exact age difference in years, months, and days, along with the total number of days between the two birthdays.