Date, Age & Countdown Calculator
InstantNewEnter a birthdate to get your exact age in years, months, and days, plus the total hours and minutes you have lived and a live countdown to your next birthday.
Pick a date
Your age updates live, down to the second.
Results
Pick a valid date of birth.
How the math works
age = whole years, then remaining months, then remaining days
countdown = next occurrence of (month, day) − nowThe age breakdown counts complete years first, then the leftover months, then the remaining days, borrowing from the previous month when needed so the result respects differing month lengths and leap years. The birthday countdown targets the next occurrence of your birth month and day.
Frequently asked questions
How is my exact age calculated?+
The calculator breaks the span between your birthdate and today into whole years, then the remaining months, then the remaining days, accounting for differing month lengths and leap years.
Does the countdown update live?+
Yes. The next-birthday countdown ticks every second entirely in your browser, so you see the remaining days, hours, minutes, and seconds in real time.
Can I calculate the time until a future event?+
Yes. Pick any future date and the calculator shows the time remaining until that event, as well as the duration since any past date.
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