# Business Days Calculator

URL: https://speedycalculator.com/calculators/everyday-life/business-days/
Last updated: 2026-10-25

> The business days calculator counts the working days between two dates for a five-day (Mon–Fri) or six-day (Mon–Sat) week, with an option to include the end date and to subtract public holidays.

## Inputs

- Start date
- End date
- Working week
- Include end date
- Public holidays on working days

## Results

- Calendar days
- Business days
- Weekend days
- Working weeks

## Formula

```
Business days = days in the period that fall on working days − public holidays
5-day week: Monday–Friday; 6-day week: Monday–Saturday
```

## Explanation

Deadlines, delivery times, notice periods and payment terms are often stated in business days. Weekends and public holidays don't count, so 10 business days usually means two calendar weeks. Holiday calendars differ by country and region – enter how many fall in your period.

### How to use the Business Days Calculator

- **Start date**
- **End date**
- **Working week**
- **Include end date**
- **Public holidays on working days**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the start and end dates, choose a 5- or 6-day working week, whether the end date counts, and the number of public holidays on working days.

### Tips

- Check whether the end date should be included – event durations usually include it, elapsed time does not.
- Months have 28–31 days, so "one month" is counted by calendar date, not as 30 days.
- Use 24-hour time or set AM/PM carefully when entering clock times.
- Time zones and daylight-saving changes are not applied unless the calculator says so.

### Common mistakes to avoid

- Counting a 30-day month when a calendar month is meant (or the reverse).
- Forgetting leap years when counting days across February.
- Mixing decimal hours (7.5 h) with clock time (7:30).

### Inputs explained

FieldWhat to enterStart dateA dateEnd dateA dateWorking weekChoose one: 5 days (Mon–Fri), 6 days (Mon–Sat)Include end dateChoose one: No, YesPublic holidays on working daysA number

### What each result means

- **Calendar days** = [End date] - [Start date] + [Include end date]
- **Weekend days** = [Calendar days] - [Business days] - [Public holidays on working days]
- **Working weeks** = [Business days]÷[Working week]

## Worked example

Inputs — Start date: 2026-10-25; End date: 2026-11-24; Working week: 5 days (Mon–Fri); Include end date: Yes; Public holidays on working days: 0.

Results — Calendar days = 31; **Business days = 22**; Weekend days = 9; Working weeks = 4.4.

## FAQ

**How many business days are in a month?**
About 20–23 for a Monday–Friday week, before holidays.

**Is Saturday a business day?**
In most countries no, but some businesses and countries work a six-day week.

**Does "within 5 business days" include today?**
Usually not – counting starts the next business day.

**What formula does the Business Days Calculator use?**
Business days = days in the period that fall on working days − public holidays.