Time & Date
Business Days Calculator
Use this business days calculator for work deadlines, shipping estimates, invoices, and project schedules.
Business days
—
- Calendar days
- —
- Weekend days
- —
Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Use this calculator with
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
What the business days calculator solves
Use this business days calculator for work deadlines, shipping estimates, invoices, and project schedules.
Formula
How to use it
- Enter start and end dates.
- Choose whether to include the start date.
- Use the business-day count for weekday-only planning.
How to read the answer
Business days exclude weekends but not holidays, closures, or custom work schedules.
Common mistakes and edge cases
- Holidays can change the real business-day count.
- Inclusive vs exclusive start date changes deadlines.
- Weekend work schedules need custom handling.
Worked examples
Work deadline
Business days
16
Include start date
Business days
6
Frequently asked questions
Does this exclude holidays?+
No. It excludes Saturdays and Sundays only.
Why exclude the start date?+
Elapsed business-day deadlines often start counting after the starting date.
Related calculators
Days Between Dates Calculator
Count days and weeks between two dates with optional inclusive counting.
Time Duration Calculator
Add or subtract durations in days, hours, minutes, and seconds with normalized time output.
Week Number Calculator
Find the ISO week number and ISO week-year for any date with weekday context.
Age Calculator
Calculate exact age or date difference in years, months, days, total days, weeks, hours, weekdays, and next birthday countdown.
Hours Calculator
Calculate elapsed hours between start and end clock times with break subtraction and overnight support.
Time Zone Calculator
Convert a clock time between UTC offsets and show date rollover for simple time zone planning.
Last updated: May 8, 2026