Date Calculator
Add days, weeks or months to a date, or count the gap between two dates.
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Business Days Calculator
Working days between two dates, holidays excluded.
Business Days Calculator tool
Counted inclusively, both ends included.
Used when adding.
As YYYY-MM-DD. Holidays differ by country and change every year, so they are yours to list.
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Working days
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Calendar days
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Weekend days
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Holidays excluded
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Result
| Measure | Value |
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About the Business Days Calculator
Business Days Calculator counts the working days between two dates, or adds working days to a date to find a deadline. Weekends are excluded, and so is any holiday you list -- public holidays differ by country and move every year, so they are an input rather than something the calculator guesses.
The weekend itself is configurable, because Saturday and Sunday is not universal. Friday and Saturday is the weekend across much of the Middle East, Sunday alone in several countries, and some contracts count every day. Getting this wrong on a thirty-day count shifts the answer by several days.
The count between two dates is inclusive of both ends, which is the convention contracts and notice periods use. The calendar-days figure is shown next to it so the difference is visible: a month that looks like thirty-one days is twenty-two working ones, and planning on the first figure is how deadlines get missed.
The page shows its working, not just its answer. Where there is a formula it is printed with your own numbers substituted in, so you can check the result rather than take it on trust -- which is the difference between a calculator you can use for something that matters and one you cannot.
Everything runs inside your browser. What you type is never uploaded, never logged and never stored, and the calculator keeps working if your connection drops after the page has loaded.
How to use the Business Days Calculator
- Choose what do you need and weekendThe fields below change to match what you pick, so only the figures that matter to your case are asked for.
- Enter start date, end date and working days to addDecimals are fine, and thousands separators are accepted and ignored.
- Read the working days, calendar days and weekend daysThe figures update as you type. The Calculate button is there if you would rather press something, but nothing waits for it.
- Copy or check the resultCopy the summary with the copy button, or open the table to check it row by row.
Features
- Shows working days, calendar days, weekend days, holidays excluded and result together, so you are not running it twice
- A results table you can read across
- Updates as you type, with no button to press and no page reload
- Copy the result in one click
- Free, no sign-up, and it runs entirely in your browser
Who uses this tool
The business days calculator is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:
- Counting working days for a notice period or SLA
- Finding the date ten working days from today
- Excluding public holidays from a project schedule
- Working with a Friday-Saturday weekend
Frequently asked questions
Are both dates included in the count?
Yes. The count between two dates is inclusive of both ends, which is the convention used by contracts and notice periods.
Why do I have to enter the holidays?
Because they differ by country, by region and by year. A calculator that guessed them would be wrong for most visitors and silently wrong at that.
Can I count backwards?
Yes, in the add mode: enter a negative number of working days to find a date before the start.
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Checked and rebuilt on 2026-10-14. The method this calculator uses is described in the section above, and corrections go through the contact page.