How to Count Business Days Between Dates
Weekends, inclusive counting, and holidays—what the result includes.
What it does and when to use it
Business days differ from calendar days. You must choose the weekend pattern and decide whether endpoints count.
What information to enter
Choose start date, end date, and the appropriate weekend convention.
How to understand the result
The result counts ordinary workdays in the range. Public holidays are not removed automatically.
Recommended step-by-step workflow
- Check the assumptionsBusiness days differ from calendar days. You must choose the weekend pattern and decide whether endpoints count.
- Use matching unitsChoose start date, end date, and the appropriate weekend convention.
- Compare with another scenarioThe result counts ordinary workdays in the range. Public holidays are not removed automatically.
Short example
A full Sunday-to-Saturday week contains five business days under both common weekend patterns, but the workdays differ.
Common mistakes
- Assuming every local holiday is included.
- Confusing an inclusive range with nights or elapsed-day difference.
Frequently Asked Questions
Does the start day count?
This calculator includes both endpoints when they are business days.
How are holidays handled?
Subtract holidays that fall on a workday manually.
Are my personal inputs saved?
No. The calculators and guides are designed for quick browser use without storing your personal input values.