How to count working days between dates
Enter a start date and an end date. The calculator normalizes the range, counts calendar days, removes custom weekend days, and optionally subtracts public holidays that fall on workdays.
Business Days Calculator
Workdays between dates
Working days between two dates
Use this page when you need the number of business days in a date range. It is designed for project schedules, billing periods, payroll windows, leave planning, and SLA checks.
Business days vs calendar days
Calendar days include every day in the range. Business days include only the days that your organization treats as working days. For most office schedules, that means Monday through Friday after holiday exclusions.
Use cases
Working-day range counts are useful whenever the real amount of available working time matters more than the raw number of days.
- Project planning and sprint deadlines.
- Invoice periods and payment terms.
- Support response windows and service-level agreements.
- HR leave, onboarding, and payroll schedules.
What the calculator returns
| Item | Value | Note |
|---|---|---|
| Business days | Qualifying workdays | After weekend and holiday exclusions |
| Calendar days | All days in range | Useful for comparing total elapsed time |
| Weekend/custom non-working days | Excluded weekdays | Based on your selected weekend rule |
| Public holidays | Excluded holiday workdays | Shown when holiday mode is enabled |
Related business-day pages
FAQ
Can the end date be included?
Yes. Turn on Include end date when the final date should count as part of the working-day range.
What if the start date is after the end date?
The calculator normalizes the range and counts from the earlier date so the result is still useful.
Can I choose custom weekend days?
Yes. You can mark any weekday as a non-working day, which is helpful for countries or teams with non-standard workweeks.