DATE & TIME CALCULATOR
Business Days Calculator
Calculate the number of business days between two dates, excluding weekends and optionally excluding holidays.
How Does the Business Days Calculator Work?
The calculator counts weekdays between your selected start and end dates. Monday through Friday are treated as business days, while Saturday and Sunday are treated as weekends.
You can also enter specific holiday dates to exclude them from the business-day count.
Are Both the Start and End Dates Included?
Yes. The calculator evaluates every calendar date from the start date through the end date, including both dates.
Weekend dates are not counted as business days, and entered holidays are also excluded when the holiday option is enabled.
Business Days Example
Suppose you want to calculate the number of business days from Monday through Friday of the same week. There are five calendar days and all five are weekdays, so the result is five business days.
Business Days vs. Calendar Days
Calendar days include every day of the week, including Saturdays and Sundays.
Business days normally refer to weekdays, although the exact definition can vary depending on the organization, industry, or contract.
How Are Weekends Handled?
Saturday and Sunday are excluded from the business-day count.
For example, a Monday-to-Friday period contains five business days, while a Monday-to-Sunday period contains five business days and two weekend days.
How to Exclude Holidays
Select the "Exclude holidays" option and enter holiday dates in YYYY-MM-DD format, separated by commas.
For example:
2026-12-25, 2026-12-31
The calculator will remove those dates from the business-day count when they fall within the selected date range and are not weekends.
Important Note About Holidays
The calculator does not automatically determine holidays for a particular country, state, or company. Holiday calendars vary by location and organization.
Enter the specific holidays that should be excluded for your situation.
Frequently Asked Questions
Does the business days calculator include weekends?
No. Saturday and Sunday are excluded from the business-day count.
Are holidays automatically excluded?
No. You can manually enter the holidays you want to exclude using the holiday option.
Are the start and end dates included?
Yes. Both dates are included in the calculation, provided they are valid dates in the selected range.
How many business days are in a week?
A standard Monday-through-Friday workweek contains five business days.
What is the difference between business days and calendar days?
Calendar days include every day, while business days exclude weekends and may also exclude holidays.
Can I use this calculator for work deadlines?
Yes, but make sure you account for the specific holiday calendar and business-day rules that apply to your organization.