Business Days Calculator
Count working days between two dates, excluding weekends and holidays.
What the Business Days Calculator does
Business days count only the days you actually work, excluding weekends and any public holidays you specify. Both endpoints are included when they fall on working days, which matches how contractual and shipping deadlines are usually counted.
Formula
Step through each date from start to endCount the day if it falls on a working weekday and is not a listed holiday
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Start date | date | Yes | — |
| End date | date | Yes | — |
| Working week | one of 4 options | Yes | — |
| Public holidays | text | Optional | Comma-separated dates in YYYY-MM-DD format. |
How to use it
- Choose Working week.
- Enter Start date and End date.
- Optionally add Public holidays.
- Select Calculate.
Worked example
From 1 June 2026 to 30 June 2026, Monday to Friday, with 1 June a holiday.
- Start
- 2026-06-01
- End
- 2026-06-30
- Week
- Mon–Fri
- Holidays
- 2026-06-01
30 calendar days containing 22 weekdays, less 1 holiday, giving 21 business days.
Frequently asked questions
Are the start and end dates included?
Yes, when they fall on working days. If your contract counts "within 5 business days of receipt", the receipt day is usually excluded — subtract one in that case.
Which working week should I choose?
Monday to Friday is standard in most of the world. Sunday to Thursday applies in parts of the Middle East, and six-day weeks are common in some sectors.