How to use this calculator
- Enter the start date.
- Enter the end date.
- Read the total difference in days, weeks, months and years.
What your result means
The total counts the calendar time between the two dates. Whether the end day itself is included depends on the measure shown, so check both dates when a single day matters for a deadline.
Why "how many days until..." is harder than it looks
Months have 28 to 31 days, leap years add a wildcard, and counting inclusively or exclusively changes the answer. Get it wrong and deadlines, notice periods and holidays land on the wrong day.
Whether you’re counting down to a wedding or working out a contract notice period, letting the calendar do the borrowing removes the guesswork — and the off-by-one errors.
How it works
The calculator counts the exact number of whole days between your two dates using the real calendar, then converts that into weeks and a calendar-accurate years/months/days breakdown. Leap years are handled automatically.
Frequently asked questions
Is the end date included?＋
The count is the number of days between the two dates, i.e. exclusive of the start day. Add one if you need to count both endpoints.
Can the dates be in any order?＋
Yes — the result is always the absolute difference, so order doesn't matter.