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Next birthday
Birthday Calculator
Find your next birthday, days remaining, age turning, and day of the week.
Calculate your next birthday
Enter your birthdate to see when your next birthday falls.
How the birthday calculator works
Input
Date of birth
Enter your birthday
Today's date
Used for countdown
Calculate birthday
Show next birthday
Results
Next birthday
Date it arrives
Days until
Countdown total
Age turning
Next age
Day of week
Birthday weekday
Example birthday calculation
Date of birth
May 31, 1971
Today
May 28, 2026
Result
Next birthday + age turning
Common birthday calculator questions
How does the birthday calculator work?
It compares today's date to your date of birth to find the next occurrence of your birthday, then counts the exact days remaining.
Does this calculator work for leap-year birthdays?
Yes. If you were born on Feb 29, this calculator uses Feb 29 in leap years and Feb 28 in non-leap years.
What if my birthday is today?
The result card will show 0 days remaining, your current age, today’s weekday, and a simple birthday note.
Can I calculate birthdays for any year?
Any past valid birthdate works. Future birthdates are not accepted, since the purpose is to calculate how old you are and when your next birthday falls.