Business Days Calculator
Calculate the exact number of working days between any two dates, excluding weekends. Useful for SLA tracking, project planning, and deadline management.
Enter Dates
Formula
Business Days = Count of Mon–Fri days from Start Date to End Date (inclusive)
Every calendar day between the two dates is checked. If it falls on Monday through Friday, it is counted. Saturday and Sunday are always skipped.
Worked Example
Scenario: A client raises a support ticket on Monday 5 May. Your SLA requires a response within 5 business days.
Start: Monday 5 May • End: Friday 9 May
Result: 5 business days (Mon, Tue, Wed, Thu, Fri — no weekends in that window).
If the period had crossed a weekend (e.g. Mon 5 May to Mon 12 May), the result would be 6 — Saturday and Sunday are excluded.
Common Mistakes
- Forgetting that both dates are inclusive. Mon 1 May to Fri 5 May = 5 business days, not 4.
- Expecting public holidays to be excluded. This calculator only excludes weekends. For UK or EU bank holidays, use the regional calculators.
- Confusing calendar days with business days. A 30-calendar-day SLA is not the same as a 30-business-day SLA — the latter is roughly 6 weeks.
How to Use
- 1
Enter the start date
Select the first day of the period you want to measure.
- 2
Enter the end date
Select the last day. Both dates are included in the count.
- 3
Click Calculate
The tool counts every Mon–Fri between the two dates.
- 4
Copy your result
Use the copy button to paste into emails or project trackers.