Age calculator
Enter your date of birth and see your exact age instantly.
100% private — your files are processed on your device and never uploaded to a server.
How it works
- 1
Enter your date of birth
Tap the date field and pick the day, month and year you were born.
- 2
See the result instantly
The calculator shows your age in years, months and days as soon as you fill in the date — no button needed.
- 3
Check your next birthday
Along with your exact age, you'll see how many days are left until your next birthday.
How exact age is calculated
Calculating your age isn't as simple as dividing the total number of days by 365, because not every year has the same number of days — leap years add an extra one in February. That's why this calculator uses a calendar-based calculation: it compares your date of birth with today's date and counts how many full years, months and days have passed between them, just like counting on a real calendar.
The result includes your age in years, months and days, the total number of days you've been alive, and a countdown to your next birthday. All the math runs in your browser — the date you enter is never sent to a server.
Frequently asked questions
Why don't the months and days match what I get from dividing total days by 30?
Because months don't all have the same number of days (28, 29, 30 or 31). Dividing total days by 30 gives a rough approximation, while the calendar-based calculation counts real, complete months and days, just as you would counting on an almanac.
Does the calculator account for leap years?
Yes. The calculation is based on real calendar dates, so February 29th in leap years is counted like any other day, without introducing errors into the result.
Can the result differ because of time zones or daylight saving time?
No. The whole calculation uses the date in day-month-year form, with no hours or time zone involved, so the result is the same no matter which country or time zone you're in.
What happens if I enter a future date of birth?
The calculator will warn you that the date isn't valid, since it can't calculate an age from a date that hasn't happened yet.