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Business Days Calculator
Count Monday-to-Friday days between dates. Add your own holidays and exclusions, and choose whether to include the end date.
Example: 2026-10-06 2026-10-07. May be left blank.
- Business days
- 5
- Calendar days in the interval
- 5
- Excluded weekdays
- 0
How the calculation works
Each complete week contributes five business days. Remaining weekdays are counted individually, then unique excluded weekday dates within the interval are subtracted.
Inputs
- Start date
- End date
- Include end date?
- Excluded dates separated by spaces: Example: 2026-10-06 2026-10-07. May be left blank.
Calculation details
The start date is always included. Monday through Friday is 5 days with Friday included, or 4 without it. A holiday on a weekend is not deducted twice.
Public holidays and exceptional working weekends are not loaded automatically. This models a Monday-to-Friday schedule; enter nonworking weekdays from your own calendar.
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Updated: 2026-10-02