Days Between Dates Calculator
Quickly count the exact number of days between two calendar dates. With instant separation of standard weekdays and weekend days, this calculator gives project planners, students, travelers, and event hosts clear visibility into available working time and off days.
Starting calendar date (YYYY-MM-DD)
Ending calendar date (YYYY-MM-DD)
Include both the first and last days in the total count
Total days elapsed in the selected interval
How to Use This Calculator
- Choose your starting date from the calendar input.
- Choose your target concluding date.
- Toggle whether you want to include both the first and last day in the total count.
- View the total days alongside the weekday and weekend distribution.
Formula & Calculation Methodology
Calculates cumulative calendar days across the interval while evaluating the day-of-week index (0 for Sunday through 6 for Saturday) for every intermediate day to categorize weekdays and weekend days.
Worked Example
Summer interval from June 1, 2026 to August 31, 2026 (inclusive)
Frequently Asked Questions
Why does inclusive counting add one day to the total?↓
Exclusive counting calculates duration (the time elapsed between point A and point B), while inclusive counting counts physical calendar dates touched. For example, Monday to Tuesday is 1 day elapsed, but 2 calendar dates.
Does this calculator exclude public or bank holidays?↓
This calculator segments strictly by calendar weekdays (Mon–Fri) and weekend days (Sat–Sun). For factoring in official statutory bank holidays, use our Business Days Calculator.
Can this tool calculate multi-year intervals?↓
Yes. You can compare dates separated by decades or centuries; the engine reliably accounts for all intermediate leap years and week progressions.
What limitation should I know about countries with Friday-Saturday weekends?↓
This tool assumes standard Western Saturday–Sunday weekends. In jurisdictions where the weekend falls on Friday and Saturday (or Thursday and Friday), weekend tallies will shift by one day.
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Open calculator →Source Citation & Disclaimer
Informational tool only; not licensed tax, legal, or financial advice.