Measure an interval without confusing days and working days
Elapsed days or included dates?
By default, the calculator measures the gap between two dates: from July 17 to July 20 there are three days. Enable include end date to count both endpoints and get four included calendar dates. Use the gap for elapsed time and the inclusive option when your task explicitly counts both dates.
Weekdays are not a holiday-adjusted calendar
The weekday tile counts Mondays through Fridays; the weekend tile counts Saturdays and Sundays. Neither tile removes public holidays. For a working calendar with holidays, regions or a custom workweek, use the business-days calculator.
Calendar breakdown and equivalent durations
Years, months and days describe the original date interval, using whole calendar months and a remaining day count. The inclusive switch adds one to the total and weekday/weekend split, not to that original interval description. Weeks use groups of seven days; hours and minutes are equivalents using 24 hours per day, not a measurement of clock time across daylight saving changes.
Check date order
If the end date is earlier than the start, this tool orders the dates and reports a positive interval. It does not express a negative duration. This is useful for comparing dates, but check the displayed order before copying the result.
July 17–20, 2026
| Mode | Count |
|---|---|
| Default elapsed interval | 3 days: Friday, Saturday and Sunday in the split |
| Include end date | 4 dates: 2 weekdays and 2 weekend days |
| Same date in both fields | 0 elapsed days; 1 included date if inclusive |
Frequently asked questions
Does it subtract holidays?
No. The weekday count is only a Monday–Friday split.
Can I count nights between arrival and departure?
The default gap can represent the number of date changes. Do not enable the inclusive option unless your booking or billing convention counts both dates.
Does changing the order make the total negative?
No. The dates are ordered before calculating the positive difference.
See the rules and formulas in our calculation methodology. Found a discrepancy? Send an example for review.
Explanation reviewed October 17, 2026. Example results depend on the stated assumptions.