Business Days Calculator
Count the working days between two dates, excluding weekends and any public holidays you add, with a configurable weekend.
How it works
The count walks each day in the span and skips anything that is a weekend or a holiday you have listed. That is slower than arithmetic but it is the only way to get holidays and part-weeks right.
The weekend is configurable because it is not the same everywhere. Saturday and Sunday is the common case, but Friday and Saturday is standard across much of the Middle East, and some contracts treat Saturday as a working day.
Public holidays vary by country and by region within a country, so the tool cannot know yours — add the ones that apply to you. Nothing you enter leaves your browser.
The formula
Business days
total days − weekend days − holidays in range
Weeks of work
business days ÷ 5
Rule of thumb
≈ calendar days × 5/7
Close for long spans, wrong for short ones and around holidays.
Worked examples
| Scenario | Working | Result |
|---|---|---|
| A 30-day calendar month | Minus weekends | About 22 working days |
| Mon 1 Jan to Fri 12 Jan | Inclusive, no holidays | 10 working days |
| The same span with 1 Jan a holiday | Minus one | 9 working days |
When you'd use it
- Working out a contractual deadline in working days
- Planning a project or sprint schedule
- Counting leave or notice periods
- Estimating a delivery or processing time
Common questions
Is 30 days the same as 30 business days?
No, and the gap is large. Thirty calendar days is about 22 working days; thirty working days is about six weeks. Contracts often specify which, and mistaking one for the other misses deadlines.
Why do I have to enter holidays myself?
Because they differ by country, by region and by year, and a wrong holiday list is worse than none. Everything runs in your browser, so nothing you enter is uploaded — but that also means the tool has no holiday database to draw on.
Can I set a different weekend?
Yes. Saturday and Sunday is the default, but you can choose the days that apply where you are — Friday and Saturday is standard across much of the Middle East.