Exact Age and Days Between Dates

How old are you exactly, how many days are left until a deadline, or what date is 90 days from today? This calculator answers all three in one place. Pick a mode, enter your dates, and the result updates as you type.

• Age: Your exact age in years, months and days, plus total months, weeks and days, and how many days remain until your next birthday and which weekday it falls on.
• Between two dates: A years/months/days breakdown, total days, weeks and days, and the number of business days (Monday to Friday). Optionally include the end date.
• Add / subtract: Move a date forward or back by any number of days, weeks, months or years and see the resulting date with its weekday.
• Order does not matter: If the end date is before the start date, the dates are swapped and you are told so.

How the calculation works

Calendar Days, Not Hours

Every calculation is done on calendar dates rather than clock times. Daylight saving changes and your time zone can never make a result one day too short or too long.

Month Ends and Leap Years

Months have different lengths, so adding one month to January 31 gives the last day of February (February 28, or 29 in a leap year). If you were born on February 29, your birthday is counted on February 28 in non-leap years, and the tool tells you when that applies.

Frequently Asked Questions