Which days count as business days?
By default Monday through Friday. You can adjust the weekdays in the form.
Business Day Calculator
Calculate the number of business days between two dates – free, no sign-up required.
Result
Understanding and calculating business days
What is a business day?
A business day is a calendar day on which work is usually done. By default, Monday through Friday count as business days.
How are business days calculated?
The calculator counts all days in the selected period that fall on a selected weekday and are not marked as an additional day off.
Are public holidays included automatically?
No. Public holidays are not detected automatically. You can enter them manually under “Additional days off”.
Are the start and end dates included?
Yes, both boundaries are included by default. You can include or exclude the start and end date individually.
What can this calculator be used for?
Typical uses include project planning, delivery deadlines, processing times, contract periods, leave planning and calculating available business days.
Related calculators
Frequently asked questions about the business day calculator
Are weekends counted?
No, unless Saturday and Sunday are selected as workdays.
Can I include public holidays?
Yes, enter them as additional days off.
What happens if the end date is before the start date?
An error message is shown. The dates are not swapped automatically.
Are the start and end dates included?
Yes, both are enabled by default and can be toggled individually.