Working Days
Business days between two dates
The Working Days Calculator counts the number of business days (Monday through Friday) between two dates, excluding weekends. Useful for project planning, freelance billing, vacation accruals, and any deadline that follows business-day rules.
What it counts
- Business days (Mon–Fri) between the two dates.
- Total calendar days for comparison.
- Number of weekend days excluded.
It does not subtract public holidays. If your project must account for specific holidays, subtract the relevant number from the result.
How it counts
For each day between the two dates, the calculator increments the count only if the day is a weekday. It iterates from the earlier date to the later one and totals weekday matches.
Worked example
From Monday, November 3, 2025 to Friday, November 28, 2025:
- Calendar days: 25
- Weekends excluded: 8 (4 Saturdays + 4 Sundays)
- Working days: 19 (note: not subtracting the US Thanksgiving holiday — that is up to you)
When to use this
Freelancers billing by working day, project managers building schedules, HR for PTO accruals or notice periods, and anyone working with contracts that specify "five business days" type language.
Holidays are not included
Public holidays vary by country and even by state or region. Adding a generic holiday calendar would be misleading. Treat the working-days count as Monday–Friday only, and adjust manually for any holidays that fall in the date range.
Frequently asked questions
Are both endpoints included?
Yes. The count is the number of weekdays from the start date to the end date, inclusive.
What about partial days?
The calculator treats each day as a whole unit. For hourly precision, use a project-management tool with hour-level tracking.
Why no holiday list?
Holidays vary by country, state, and organization. A built-in holiday calendar would be wrong for most users. Subtract the holidays that apply to you from the result.