Business days exclude weekends and public holidays. They matter for shipping estimates, contract deadlines, and financial settlement periods.
Counting Business Days
Start from the day after the start date, count weekdays until reaching the target. Our Business Days Calculator automates this.
Calendar Days vs Business Days
A "10 business day" delivery from Friday may arrive two weeks later calendar-wise because weekends don't count.
Holiday Considerations
Holiday calendars vary by country. Financial markets observe different holidays than federal offices.
Going Deeper
Count working days excluding weekends for deadlines and shipping. This guide connects theory to practice — use the related calculators linked at the bottom to verify each example with your own numbers.
Practical Tips
- Write down given values and unknowns before opening the calculator.
- Check units and rounding rules appropriate to your context (class, lab, or business).
- Compare manual working with the calculator result to build confidence.
Common Mistakes to Avoid
- Rushing inputs without reading field labels carefully.
- Confusing similar formulas that use different variables or units.
- Reporting results with more precision than your inputs justify.
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