Business Days Calculator
Pick two dates and we count the Monday to Friday days between them. Add holidays to skip those as well.
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The formula
Business days = calendar days - Saturdays - Sundays - listed holidays that fall on weekdays.
How it counts
Weekends are Saturday and Sunday. Any date you list under holidays is taken out, but only if it falls on a weekday, so a holiday on a Sunday is not subtracted twice.
Tick "Count the end date too" if the last day should be included. Leave it off if you want the gap between the dates, with the start day counted and the end day not.
Example
October 2026 has 31 days and 9 of them are weekend days, leaving 22 weekdays. If 2 October is a public holiday, that drops to 21 business days.
Where people use it
- Delivery and shipping estimates quoted in "working days"
- Notice periods, payment terms and refund windows
- Project schedules and sprint planning
Be careful with contracts: they may define business days differently, for example excluding bank holidays in a particular country. Add those holidays to the list to match.
Examples to check
Type these into the calculator above to see how it behaves. Every result below was produced by the same calculator code that runs on this page.
| What you enter | What you get |
|---|---|
| Start date: 2026-10-01; End date: 2026-10-31; Count the end date too | Business days: 22 |
| Start date: 2026-12-01; End date: 2026-12-31; Count the end date too; Holidays to skip (optional, one date per line as yyyy-mm-dd): 2026-12-25 | Business days: 22 |
| Start date: 2026-03-02; End date: 2026-03-06; Count the end date too | Business days: 5 |
Business Days Calculator: frequently asked questions
Does it include public holidays automatically?
No, because they differ by country and region. Paste your local holidays, one per line, and they are skipped.
How many working days are in a year?
Usually 260 or 261, before holidays. Most countries have between 8 and 15 public holidays, so expect about 245 to 252.
Can I use a six-day working week?
Not in this version. It assumes Saturday and Sunday are the weekend.
Does it take leap years into account?
Yes. Calculations use real calendar dates, including leap days and the different lengths of months.
Is what I enter in this calculator saved or sent anywhere?
No. The calculation runs in your browser, so what you enter is not sent to our servers. We only count, anonymously, whether a tool ran successfully.
Is this calculator free to use?
Yes. It is free, needs no sign-up and has no usage limit.
Last reviewed: October 3, 2026