The output gives working days, working hours, non-working days and the calendar span, so it works for payroll, capacity planning and project estimating alike. For a standard Monday-to-Friday count the Business Days Calculator is quicker; use this one whenever your week is not the default.
Calculator
How to use the Working Days Calculator
- Set the start and end dates.
- Tick the weekdays that count as working days for you.
- Enter the number of holidays inside the range.
- Set your working hours per day and read the totals.
About this tool
The Working Days Calculator is built for speed and accuracy: every calculation runs in your browser, so your data never leaves your device and the result updates as you type. It works equally well on a phone, a tablet or a desktop, and it is free to use as many times as you like.
Common use cases
- Planning capacity for a Sunday-to-Thursday workweek.
- Calculating payroll hours for a part-time pattern.
- Estimating project effort across a custom schedule.
- Counting billable days in an invoice period.
Tips for the best result
- Use the latest figures you have - even a small change in rate or term can shift the outcome by hundreds.
- For annual figures, divide by 12 to get a monthly number you can compare with the result.
- Bookmark this page and revisit the calculation as the inputs change.
Frequently asked questions
How is this different from business days?
Business days assume Monday to Friday. This calculator lets you define the working week yourself and also outputs working hours.
Can I count half days?
Yes. Reduce the "working hours per day" value or subtract the half days from the holiday count.
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