Plenty of things in a semester are quoted in business days rather than calendar days. A professor who says “feedback within three business days”, a landlord who says repairs happen within five, a bank transfer that clears in two. Each one is quietly telling you that Saturday and Sunday do not count, and leaving you to work out what that means in a month with a holiday in the middle.
This tool takes a start date and an end date and tells you how many weekdays fall in between, along with the total calendar days and how many weekend days were thrown out.
One detail worth knowing before you use it for anything important: both dates count. The walk from the start date to the end date includes the day you started on, so a plain Friday to Monday span reads 2 business days, not 1.
Calculate business days between two dates, excluding weekends. Useful for project deadlines, delivery estimates, and work planning.
Both dates count, and that trips people up
The calculation is deliberately literal. It starts on your start date, checks whether that day is a weekday, moves forward one day, and keeps going until it has passed your end date. Whatever it found on weekdays becomes the business day count, and the calendar span is simply the difference between the two dates plus one.
So look at these three, all in 2026:
| Range | Business days | Calendar days | Weekend days |
|---|---|---|---|
| Fri Feb 27 – Mon Mar 2 | 2 | 4 | 2 |
| Mon Mar 2 – Fri Mar 6 | 5 | 5 | 0 |
| Mon Mar 2 – Fri Mar 13 | 10 | 12 | 2 |
The first row is the one people argue with. Friday to the following Monday is a weekend plus two working days, and since Friday is day one you get 2. If you expected 1, you were counting from the day after you started — a different convention, equally valid, just not this one.
Two guards come with it. Both dates are required, or you get “Please enter both start and end dates.” And the end has to be at or after the start, otherwise “End date must be after start date.” There is no negative count in this thing.
What it does not count
Holidays. The tool knows weekends and nothing else. Family Day, Good Friday, the July long weekend, December 25 — all of them come through as ordinary business days. If your range crosses one, your number will be one higher than the one in the HR portal or the bank app, and neither of you is wrong, you are just using different calendars. For anything with money attached, check the official holiday schedule for your province or state before you rely on the figure.
Hours either. It is date-only, so a deadline at 4pm on a Friday and one at 9am the Monday are both full days in the count. If the agreement says “within 24 business hours”, you want an hours-between calculator instead.
Timezones are not in it either. The dates come straight from the two pickers and are compared as plain calendar dates, so daylight saving will not shift your answer by a day. Small thing, but worth being glad about in March and October.
Turning a count into an actual date
The tool answers “how many weekdays are in this range”, not “add three business days to this date”. Those are the same question read backwards, and you can get the second one by widening the end date until the business day count reaches the number you need.
Suppose you submitted an assignment on Friday Feb 27 and the course outline promises feedback within five business days. Set the end date to Thursday Mar 5 and the count comes out 5, because the day you submitted is included. Set it to Friday Mar 6 and you get 6. If the marker starts counting the day after submission instead, the answer they mean is Friday Mar 6.
Both readings are common, and this is the part of any deadline worth a two-line email rather than a guess. “Does the day I submitted count?” is a question people are usually happy to answer, and it moves your answer by a full day.
Other tools
- class hours per semester — contact time in hours, which is the other number a schedule is quoted in
- commute time and cost — because the travel between those days is real time too
- coop hours tracker — work placements are usually counted in hours rather than days
Frequently asked questions
Does it include public holidays?
No. Weekends are the only thing it removes. A range crossing a statutory holiday shows one more business day than your employer or bank counts, so check that calendar yourself when the dates matter.
Do the start and end dates count?
Yes, both. The count includes the day you start on and the day you finish on. That is why Friday to Monday reads 2 rather than 1, and why the calendar total is the difference between the dates plus one.
Why does my answer differ from the bank’s?
Almost certainly holidays. The tool counts Monday to Friday and assumes every weekday is a working day. Banks, courts and government offices maintain their own holiday lists, and a single one in the middle of your range moves the answer by a day.
Can it tell me the date three business days from now?
Not directly. It counts a range rather than adding to a date, so set the start to today, then move the end date out until the business day count hits three. That date is your answer, and it counts today as day one unless you start from tomorrow.