Example 1
- Start: January 5, 2026
- End: January 9, 2026
- Saturday and Sunday are left out
5 business days
How many business days from January 5 to 9, 2026? 5. These days run from Monday through Friday, with no Saturday, Sunday, or holiday.
Business Days Calculator
The calculator counts days between two dates, or it finds the date after a number of business days. You can include the end date or leave it out. The weekend can be Saturday and Sunday, Sunday only, or Friday and Saturday. You can also count all seven days of the week. A holiday from the list does not count in the result when that day would have been a working day anyway.
Result
Enter both dates. The business-day count will appear here.
The holiday list is empty until you type a date. The button inserts US federal holidays for the year of the start date. Every calendar day, including Saturday and Sunday, is on the date difference page.
How it works
StartJan 5, 2026
EndJan 9, 2026
Business days5
The calculator checks every day from the start date to the end date. You include the end date or leave it out. A day counts in the result when it is not a weekend under the rule you choose, and it is not on the holiday list.
From January 5, 2026 (Monday) to January 9, 2026 (Friday), when Saturday and Sunday are left out and the holiday list is empty, the result is 5. Those days run from Monday through Friday, so there is no Saturday or Sunday in them.
From January 5 to January 11, 2026, under the same rule and with an empty list, the result is still 5, because Saturday, January 10 and Sunday, January 11 do not count. When only Sunday is left out and the list is empty, the result is 6. When all 7 weekdays count and the list is empty, the result is 7.
From January 1 to 7, 2026, when Saturday and Sunday are left out and January 1 is not on the list, the result is 5. When January 1 is on the list, the result is 4, because that Thursday does not count.
When the end date is earlier and “Include the end date” is checked, the calculator counts the same days from the earlier date to the later one. The same working day then counts as 1.
When you want the date after a number of business days, the start date is not part of that count. Five business days after January 5, 2026, when Saturday and Sunday are left out and the list is empty, is Monday, January 12, 2026. This result is not a leave balance or a count of sick days.
The holiday list is empty until you type a date. The button inserts the 11 observed US federal holidays for the year of the start date. In 2026 all 11 fall on a weekday. July 4 is a Saturday, so the list uses Friday, July 3. From January 1 through December 31 the year has 250 business days instead of 261.
Formula
business days = days from the start date to the end date that are not a weekend under the rule you choose and are not on the holiday list
The end date counts when “Include the end date” is checked. The weekend can be Saturday and Sunday, Sunday only, or Friday and Saturday. You can also count all seven days of the week. A holiday on a day that the weekend rule already skips does not change the result. When you want the date after a number of business days, the start date is not part of this count. Five business days after January 5, 2026, when Saturday and Sunday are left out and the list is empty, is January 12, 2026.
How to use
- Enter the start and end dates, for example January 5 and January 9, 2026.
- Choose the weekend rule. Leave “Include the end date” checked, or clear it.
- Add a holiday in the date field. Add another holiday with the button. The “Insert US federal holidays” button writes the list for the year of the start date.
- Click Calculate. Between two dates, the result is the number of days that are not a weekend and are not on the holiday list.
- Choose “The date after a number of business days” when you want a date, not a count. Five business days after January 5, 2026, when Saturday and Sunday are left out and the list is empty, is January 12, 2026.
5 days from January 5 to 9, 2026
Monday, January 5 to Friday, January 9, 2026 is 5 business days when Saturday and Sunday are left out and the holiday list is empty.
- Business day
- A day from the start date to the end date that is not a weekend under the rule you choose and is not on the holiday list.
- Both dates
- When “Include the end date” is checked, both dates count when they are working days. The same working day then counts as 1. When Friday is a day off, that same Friday counts as 0.
- Holiday
- A date from the list. It does not count in the result only when that day would have been a working day.
Examples
Example 2
- Start: January 5, 2026
- End: January 11, 2026
- Only Sunday is left out
6 business days
How many business days from January 5 to 11, 2026, when only Sunday is left out and the holiday list is empty? 6. Saturday, January 10 still counts.
Example 3
- Start: January 1, 2026
- End: January 7, 2026
- Saturday and Sunday are left out
- Holiday: January 1, 2026
4 business days
How many business days from January 1 to 7, 2026 when January 1 is a holiday? 4. That Thursday does not count.
Example 4
- Start: January 5, 2026
- Plus: 5 business days
- Saturday and Sunday are left out
January 12, 2026
What date is 5 business days after January 5, 2026, when Saturday and Sunday are left out and the list is empty? Monday, January 12. The start date is not part of this count.
Example 5
- Start: January 1, 2026
- End: December 31, 2026
- US federal holidays
250 business days
How many business days does 2026 have after US federal holidays? 250. Without holidays on the list, the year has 261 weekdays.
Related calculators
Frequently asked questions
How many business days are there from Monday, January 5, 2026 to Friday, January 9, 2026?
5. Both dates count. There is no Saturday or Sunday in that range, and the holiday list is empty.
How many business days from January 5 to 11, 2026 when Saturday and Sunday are left out?
5. Saturday, January 10 and Sunday, January 11 do not count, and the holiday list is empty. There are 7 calendar days in this range.
How many business days from January 5 to 11, 2026 when only Sunday is left out?
6. Saturday, January 10 still counts, and the holiday list is empty. Only Sunday, January 11 is left out.
How many days from January 5 to 11, 2026 when all 7 weekdays count?
7. The result then equals the number of calendar days, until a holiday from this range is on the list.
How does January 1, 2026, affect the result?
That day does not count in the result when it would otherwise have been a working day. From January 1 to 7, 2026 with Saturday and Sunday left out, the result is 4, not 5.
Do both dates count?
By default yes, when they are not a weekend under the chosen rule and are not on the holiday list. You can leave the end date out. Then January 5 to 9, 2026, when Saturday and Sunday are left out and the holiday list is empty, is 4, not 5.
What if the end date is earlier?
When “Include the end date” is checked, the calculator counts the same days from the earlier date to the later one. The business-day count does not change. When that box is cleared, the end date is left out of the result.
Is there an official holiday calendar here?
The calculator does not insert them on its own. The button writes the observed US federal holidays for the year of the start date, and those dates stay in the fields. In 2026 there are 11, and all 11 fall on a weekday. You can remove a day or add your own.
Is this leave or sick time?
No. Leave and sick days need a separate calendar. This page uses the weekend rule you choose and your holiday list.
Where do I add several calendar days to a date?
On the page that adds days to a date. There every calendar day moves the date, including Saturday and Sunday.
What date is 5 business days after January 5, 2026?
Monday, January 12, 2026, when Saturday and Sunday are left out and the holiday list is empty. The start date is not part of that count.
How many business days does 2026 have after US federal holidays?
There are 250 business days from January 1 through December 31, when Saturday and Sunday are left out. Without those holidays the year has 261 weekdays. All 11 observed federal holidays fall on a weekday. July 4 is a Saturday, so the list uses Friday, July 3.
Sources
A business day on this page depends on the weekend rule you choose and on the dates you enter as holidays.
Page updated October 1, 2026.