Find the exact time between two dates — your precise age in years, months and days, plus the total number of days.
This calculator finds the exact difference between two calendar dates, expressed the way people naturally think about age: whole years, then whole months, then remaining days — while also giving you the raw total in days and weeks, which is handy for medical forms, visas, or eligibility checks that specify an age in days.
Months don't have a consistent number of days, and leap years add an extra day roughly every four years. A reliable age calculation has to account for both, which is why simply subtracting years can be off by one if the birth month and day haven't occurred yet in the current year.
Yes — set the first date to any starting date, not just a date of birth, and the second field to any end date to get the exact interval.
Yes, the calculation uses actual calendar dates, so leap years are automatically factored into the day and week totals.
The calculator counts a full month only once that calendar day has passed in the new month — so between, say, Jan 31 and Mar 1, the result correctly shows just under one full month, not one exactly.