Enter your date of birth to find your exact age in years, months, days, weeks, and hours — plus days until your next birthday.
Age Calculator is a free, instant tool that turns a date of birth into your exact age in years, months, and days — plus total days lived, weeks, hours, and a countdown to your next birthday.
Working out an age in your head is surprisingly fiddly: months have different lengths, leap years add an extra day, and a simple year subtraction is often wrong by a day or two. This calculator counts real calendar days between two dates, so the breakdown is always precise. People reach for it to:
Because everything runs in your browser, your date of birth is never uploaded or stored — calculate your own age or someone else's with complete privacy. The "As of" field lets you pick any reference date, so you can find how old you were at a past event or how old you'll be on a future one.
Whether you need a quick "how old am I" answer, an exact age for an official document, or a fun count of how many days you have been alive, this tool gives every figure at once without any sign-up or app to install.
Exact age is the difference in complete years, then remaining complete months, then the remaining days between the birth date and the reference date.
Yes — change the "As of" date to any past or future date. The result will reflect age at that specific moment.
Leap-year birthdays are handled correctly. In non-leap years the birthday is treated as March 1 for the next-birthday countdown, so the result stays consistent every year.
Enter your date of birth and the calculator shows your total days lived directly in the results, counting every calendar day between your birth date and the reference date, including leap days.
The calculator counts real calendar days, so every February 29 you have lived through is included automatically. Your year, month, and day breakdown therefore stays accurate no matter how many leap years fall in the range.
The next-birthday card finds the next time your birth day and month occur, in the current year or the year after, and counts the days remaining from the "As of" date. If it lands today, it wishes you a happy birthday.
No. Every calculation runs entirely in your browser. Your date of birth is never uploaded or saved to a server, so your personal information stays completely private.