About the Days Between Dates Calculator
Exact number of days between two dates, with and without the end date included.
Also known as: how many days between, day counter, date to date days, count days.
How to use this calculator
- Enter from, to.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
days = |end date − start date|
Worked example
Using the values pre-filled in the calculator above:
- From: 2026-09-22
- To: 2026-12-21
the calculator returns:
- Days between: 90
- Including both dates: 91
- Weekdays: 65
- Weekend days: 26