Business Days Calculator – Working Days Between Dates
Calculate the number of business days between two dates, excluding weekends.
About This Calculator
Calculate the number of business days between two dates, excluding weekends. Use the calculator above for instant results.
Worked Examples
- Calendar days: 90 | Business days: 63 | Weekends: 27
Answer: 63 business days
- 14 calendar days = 10 business days
Answer: 10 business days
- ~63 business days in a typical quarter
Answer: ~63 business days
Who Uses This Calculator?
Calculate project timelines.
Plan PTO and work schedules.
Calculate settlement and payment deadlines.
Count instructional days.
Common Mistakes to Avoid
❌ Not counting holidays
This calculator excludes only weekends, not public holidays. Subtract observed federal holidays (11 per year) manually if needed.
❌ Inclusive vs exclusive dates
This calculator includes both start and end dates. For deadlines, clarify whether the deadline date is included.
Frequently Asked Questions
Business days vs calendar days?
Business days = Monday-Friday only. Calendar days = all 7 days/week.
US federal holidays?
11 per year: New Year's, MLK Day, Presidents Day, Memorial Day, Juneteenth, July 4th, Labor Day, Columbus Day, Veterans Day, Thanksgiving, Christmas.
Working days in a year?
Typically 260 (52 weeks x 5 days) minus ~11 federal holidays = ~249 working days per year.