Age Calculator
How many days have you been doing this whole "being alive" thing? Punch in your birth date and get your exact age down to the day — plus a countdown to your next excuse for cake.
How to use
- Enter your date of birth. Tap the date field and pick your birthday (or type it in, YYYY-MM-DD).
- Hit "Calculate my age". You'll get your exact age in years, months, and days — calculated calendar-style, so month lengths and leap years are handled correctly.
- See the extras. Below your age, you'll find how many total days you've been alive and how many days remain until your next birthday.
- Wondering about someone else? Enter any past birth date — a pet's gotcha day, a friend's birthday — it works the same way.
Frequently asked questions
How do I calculate my exact age in years, months, and days?
Enter your birth date in the tool above and it does the work: it subtracts your birth date from today's date, borrowing months and days the way a calendar does, so you get an exact figure like 34 years, 2 months, and 11 days. It also shows your total days lived and the countdown to your next birthday.
How many days have I been alive?
The tool computes this automatically once you enter your birth date — it counts every single day between your birthday and today, leap days included. The total-days figure appears right under your exact age.
How many days until my next birthday?
Enter your birth date and the calculator figures out when your next birthday falls (this year or next, whichever comes first) and counts the days down to it. It's right there in the results — no mental math required.
Does this age calculator handle leap years correctly?
Yes. The calculation works with real calendar dates rather than assuming every year has 365 days, so leap-day birthdays (February 29) and leap-year spans are handled properly. Your exact age uses actual elapsed months and days.
Is my birth date sent anywhere?
No. Everything runs locally in your browser — your date of birth never leaves the page, isn't uploaded, and isn't stored. Close the tab and it's gone.
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