How to use this calculator
The business days calculator counts dates that match your working schedule or finds a date after adding working days. Select the working weekdays and enter any closure dates. Use Between for a range, or Add / subtract to move forward or backward by a whole number of working dates. The schedule belongs to your calculation rather than a presumed country or employer.
Set the start and end inclusion options deliberately when counting a range. Public holidays are not automatically excluded. A closure affects the answer only when you enter its date and it would otherwise be a working day. For partial days, opening hours, lunch intervals, or service-level targets expressed in hours, use Business Hours Calculator instead.
Formula and calculation method
Business-day count = sum of included dates whose weekday is enabled and whose date is not a closure.
Define the schedule before counting
A working day is a date that passes both checks: its weekday is enabled and its exact date is absent from the closures. This supports patterns beyond Monday through Friday. A closure on an already-disabled weekday does not remove a second day. Keep the weekday settings and closure list with the result when explaining it to someone else.
Understand additions and inclusivity
Adding working days starts counting after the starting date. Zero retains the original date, even if that date is closed. In range mode, the endpoint switches control whether the start and finish are eligible to count. These are separate conventions: an inclusive range is not the same operation as adding its displayed count to the first date.
Worked examples
Friday plus one working day
Use a Monday–Friday schedule with no closures. Starting on Friday, April 5, 2024, add one working day. Saturday and Sunday do not qualify, so the next counted date is Monday, April 8. If your organization works Saturdays, enabling Saturday would change the answer to April 6.
A closure extends the target
Keep the same Friday start but add April 8 as a closure. Monday is now excluded even though its weekday is enabled. The first eligible date becomes Tuesday, April 9. This demonstrates why a correct weekday pattern alone is insufficient when an office has holidays or one-off shutdowns.
Count a full workweek
Count April 1 through April 5, 2024 with both endpoints included and Monday–Friday enabled. All five dates qualify, so the total is five. Excluding the finish reduces it to four. Marking April 3 as a closure also reduces the fully inclusive count to four. Record which choice explains the difference.
Edge cases and practical checks
Closures are dates, not regional assumptions
Enter observed closure dates as they apply to the specific office or process. A public holiday’s calendar date and an office’s observed day off can differ. This tool does not download a holiday feed, infer a country from your location, or decide whether a particular organization should operate on a given date.
Partial workdays and nonworking starts
Every qualifying date counts as one full business day. A two-hour Friday therefore cannot be represented as a fraction of a day in this tool. Use business hours when opening intervals matter. A nonworking starting date is still a valid anchor for additions; the counting begins with eligible dates after it.
Frequently asked questions
Are Saturdays and Sundays always excluded?
No. You choose which weekdays qualify. The common Monday–Friday setup excludes them, but enabling Saturday or Sunday makes those dates eligible unless a closure also applies. This allows the calculation to match a store, support team, or other nonstandard schedule.
Does it include national holidays?
Only dates you enter as closures are excluded. No national or regional holiday calendar is loaded automatically. Confirm the observed dates for the organization concerned, including any substitute days off, before relying on the result for planning.
Is the starting day counted?
Range mode has an explicit start-inclusion option. Addition mode begins counting after the starting date, so adding one means the next eligible working date. Adding zero returns the original anchor, even if the anchor itself is a weekend or closure.
Can I subtract working days?
Yes. Use a negative whole-number quantity in Add / subtract mode. The calculation walks backward through eligible dates using the same weekday and closure settings. Review the closure list for the earlier period as carefully as you would for a forward calculation.
Can I count half-days?
This page counts whole dates, not fractions based on opening hours. Use Business Hours Calculator to describe shorter days or a lunch closure with separate intervals. Its answer measures eligible time inside the schedule rather than counting every open date as one unit.
Why does another business-day calculator disagree?
Compare the working weekdays, start and end inclusion, closure dates, and observed-holiday assumptions. A single endpoint or substitute holiday can change the answer. Reproduce a short range day by day before comparing a longer period, so the differing convention is visible.
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