📅Business Days Calculator
Count the number of business (working) days between two dates. Choose to exclude weekends, only Sundays, or include all days. Add up to 5 custom holidays to exclude. Shows total calendar days, weekends, holidays, and working days.
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Business Days
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Business Days Calculator: Count Working Days Between Any Two Dates
A business day is any weekday (Monday through Friday) that is not a public holiday. The standard working week has 5 business days out of 7 calendar days. June 2026 has 30 calendar days, 8 weekend days, and 22 business days. Use this calculator for project deadlines, payment schedules, and contract terms.
Formula: Business days = Calendar days − Weekends − Custom holidays
| Period | Calendar days | Business days (Mon–Fri) |
|---|---|---|
| 1 week | 7 | 5 |
| 1 month (avg) | 30.4 | ~21–23 |
| 1 quarter (avg) | 91 | ~65 |
Business day calculators are used in legal contracts, banking, project management, HR (calculating PTO), payroll, and shipping timelines. "Net 30" payment terms mean 30 calendar days; "30 business days" means approximately 6 weeks of actual working time.
Excluding Holidays
Public holidays vary by country and region. Enter custom holidays to exclude them from the business day count. Common US federal holidays include New Year's Day (Jan 1), Memorial Day, Independence Day (Jul 4), Labor Day, Thanksgiving (4th Thursday in November), and Christmas (Dec 25). The UK has 8 bank holidays per year; many European countries have 10–14 public holidays.
Frequently Asked Questions
How many business days are in a month?
Most months have 20–23 business days (Monday–Friday), depending on how many weekends fall in the month and which day of the week the month starts. January, March, May, July, August, October, and December have 31 days; April, June, September, and November have 30 days; February has 28 or 29 days. A 31-day month starting on Monday has 23 business days. Subtract public holidays for the net working days. On average, there are about 21.7 business days per month (261 working days / 12 months, before holidays).
What does "5 business days" mean?
"5 business days" means 5 weekdays (Monday through Friday), not counting weekends or public holidays. Depending on the start day, 5 business days from Monday = the following Monday; 5 business days from Wednesday = the following Wednesday. If a public holiday falls in the window, add an extra calendar day. Most shipping carriers and banks use "business days" in this sense. Government and legal deadlines often use "working days" synonymously, though some jurisdictions define "working days" differently (e.g., including Saturdays).
How do I calculate business days in Excel?
Use the NETWORKDAYS function: =NETWORKDAYS(start_date, end_date, [holidays]). This counts business days from start_date to end_date inclusive, excluding Saturdays, Sundays, and any dates listed in the optional holidays range. Example: =NETWORKDAYS("2026-06-01","2026-06-30") returns 22. To exclude specific holidays: create a range of holiday dates and reference it as the third argument. For a custom weekend (e.g., Friday–Saturday), use NETWORKDAYS.INTL with a weekend code or custom string like "0000011" (where 1 = weekend day, positions are Mon–Sun).
What is the difference between business days and working days?
In most contexts, "business days" and "working days" mean the same thing: weekdays (Monday–Friday) excluding public holidays. The subtle difference is regional and legal. In the US and UK, both terms typically mean Mon–Fri. In some Middle Eastern countries, the business week runs Sunday–Thursday, making Friday and Saturday the weekend. In some labor law contexts, "working day" may include Saturdays in a 6-day work week. When a contract specifies "business days," it usually refers to the standard Mon–Fri week in the jurisdiction where the contract is governed.