Date & time
Date calculator
Add or subtract days, weeks, months, and years from a chosen calendar date.
Calculators / Date & time / Business days
Business days calculator
Count business days between dates, or add or subtract working days with configurable weekends and optional holidays.
On this page
How long is 5 business days?
Five business days usually means one working week, excluding weekends. Public holidays can extend the calendar time, so use the calculator with the correct start date and holiday assumptions.
Business days5days
Non-business days2days
Entered holidays excluded0days
Calendar days (inclusive)7days
Calculator controls
How to calculate
Count business days between dates, or add or subtract working days with configurable weekends and optional holidays.
Count only dates that are not selected weekend days and are not listed holidays. Adding or subtracting starts after the selected starting date.
Worked example
Example inputs
Calculation: Count business days between dates · Starting date: 2026-01-05 · Ending date: 2026-01-11 · Business days to add or subtract: 7 · Weekend pattern: Saturday and Sunday · Holiday dates (comma separated, or none): none
Example resultBusiness days: 5 days · Non-business days: 2 days · Entered holidays excluded: 0 days · Calendar days (inclusive): 7 days
Assumptions and limits
Holiday calendars and working weeks vary. Enter applicable holiday dates yourself and verify contractual or legal deadlines separately.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
The weekday result is a baseline working-day count. It can differ from actual business days where public holidays, part-time schedules or another weekend pattern apply.
When this tool is useful
Estimate weekday availability within a project or leave-planning period.
Understanding your inputs
| Input | What to enter |
|---|---|
| Calculation | Enter one of the available options. |
| Starting date | Enter the value in the format shown. |
| Ending date | Enter the value in the format shown. |
| Business days to add or subtract | Enter a number of at least 0 and no more than 36600. |
| Weekend pattern | Enter one of the available options. |
| Holiday dates (comma separated, or none) | Enter the value in the format shown. |
Frequently asked questions
Are public holidays excluded?
No. Deduct applicable holidays that fall on weekdays and check the local working calendar.
What happens if both dates are the same?
The result is one calendar day: one weekday if it is Monday through Friday, otherwise one weekend day.
Go deeper: Read the worked Knowledge Base guide.