Age Calculator

How age is calculated

Your age is the time elapsed from your date of birth to a chosen date — by default, today. The calculator counts complete years first, then the leftover months, then the leftover days, accounting for the fact that months have different lengths and that leap years add a day. Enter your birth date above and it shows your exact age in years, months and days, plus the totals in days, weeks, hours and minutes.

Counting this way matters: someone born on January 31 isn't simply '30 days' from February 28 — the calculator borrows the correct number of days from the previous month so the result is calendar-accurate.

Your age in days, weeks, hours and minutes

Whole years are the everyday way to give your age, but the same span can be expressed in other units, and the totals get surprisingly large. A 30-year-old has lived roughly 10,950 days, about 1,560 weeks, more than 260,000 hours and over 15 million minutes. The dashboard above shows all of these at once — handy for milestones, birthdays and the simple fun of seeing the numbers.

What day of the week were you born?

Every date falls on a fixed day of the week, set by the Gregorian calendar. The calculator tells you which weekday you were born on — a small detail people love to know and that most age tools leave out. It's computed directly from your birth date, no lookup table needed.

Countdown to your next birthday

The calculator also shows how many days remain until your next birthday and the age you'll turn. If today is your birthday, it shows zero. This is handy for planning, reminders, or working out how long until a milestone birthday like 18, 21, 50 or 100.

Leap years and why they matter

A year is about 365.2422 days, so the calendar adds a leap day (February 29) almost every four years to stay aligned with the seasons. The rule: leap years are divisible by 4, except century years, which must be divisible by 400 — so 2000 was a leap year but 1900 was not. Because the calculator uses real calendar dates, leap days are counted automatically, including for people born on February 29.

Age between any two dates

You're not limited to today. Set the second date to any point in the past or future to find the span between two dates — useful for working out an age on a specific event, the gap between two birthdays, or how old someone will be at a future date. The same calendar-accurate counting applies in both directions.