When's your next birthday?

The birthday calculator tells you exactly how long until your next birthday — down to the second. It also shows you what day of the week your upcoming birthday falls on, how old you will be turning, and a history of recent birthdays.

Unlike simple countdown apps, our birthday countdown calculator gives you a live, ticking countdown that updates every second. You can bookmark the page and come back anytime to check your progress.

The calculator works by finding the next occurrence of your birth month and day, then computing the exact time difference from right now. If today is your birthday, the countdown will reset to 365 or 366 days automatically.

This tool also answers the popular "age calculator on birthday" query — it tells you exactly how old you'll turn on your next birthday. Whether you're planning a milestone celebration (30th, 50th, 100th!), checking your age for a legal document, or simply counting down the days — this birthday calculator has you covered.

Works seamlessly for users worldwide, supporting both DD/MM/YYYY (used in India, UK, Australia, Europe) and MM/DD/YYYY (used in the USA) date formats. Enter your date of birth (DOB) above and get your personalized birthday countdown instantly — free, no login required.