Days Between Dates Calculator
Select two dates and get the exact number of days between them, with weeks and calendar breakdowns.
What is the Days Between Dates Calculator?
Counting the days between two dates by hand means wrestling with months of different lengths and leap years. This date calculator does the calendar maths exactly: pick a start and an end date and get the total days between them.
You also get the same span expressed in weeks, and as a calendar breakdown in years, months and days — plus an option to include the end date itself, which adds one day (handy for deadlines and rental counts).
How to use the Days Between Dates Calculator
- Pick the start date.
- Pick the end date.
- Optionally tick 'Include the end date' if both days should count.
- Press Calculate days to see the total and breakdowns.
Key features
- Exact total days between any two dates
- Weeks + days and years/months/days breakdowns
- Include-the-end-date (+1) option
- Leap-year-aware calendar maths
- Private — dates never leave your device
Frequently asked questions
How are the days counted?
The tool counts the full calendar days between the two dates using exact date arithmetic, so leap years and different month lengths are handled correctly.
What does “include the end date” do?
By default the end date itself is not counted (like counting nights between dates). Tick the option to add one day and count both the first and last day — useful for rentals and deadlines.
Can I calculate dates in the past?
Yes — any two dates work, past or future, as long as the end date is not before the start date.
Does it also show weeks and months?
Yes. Alongside the total you get a weeks-and-days figure and a calendar breakdown in years, months and days.