Delivery estimates, notice periods and payment terms are usually in working days, not calendar days. This tool counts the working days between two dates, or finds the date a number of working days away, skipping weekends and any holidays you list. You can treat Saturday as a working day if your business does.
How to use it
- Choose between counting days and finding a date.
- Enter the dates or the number of working days.
- List any holidays to skip, one per line.
- Read the result.
When it helps
- Estimating delivery or project timelines.
- Calculating notice periods and deadlines.
- Planning invoice due dates.
- Counting leave days.
Good to know
- Both the start and end dates are counted when they are working days.
- Add your country's public holidays to get an accurate figure; the tool doesn't know them.
- Negative numbers count backwards.
What counts as a working day
By default, Monday to Friday count, and Saturday and Sunday don't. If your business works Saturdays, tick the option. Any dates you list as holidays are skipped as well, whether or not they fall on a weekday.
The tool doesn't know your country's public holidays, because they change by year and region. Paste the dates you need, one per line in year-month-day format.
Worked example: delivery estimate
An order placed on Monday 2 November 2026 promises delivery in 10 business days. Choose Find a date, enter 10, and the answer is Monday 16 November. With a holiday on Wednesday 11 November, the date moves to Tuesday 17.
To count between two dates instead, for example the working days between 2 and 27 November, the answer is 20, since the period covers four full working weeks.
Where it's used
Payment terms, legal deadlines, shipping estimates, notice periods and project plans are all counted in working days. Because of that, "net 30" and "30 business days" are very different promises.
When writing a contract, state how days are counted and which holidays apply. When reading one, check, since a vague term can mean several different dates.
Holidays and regional differences
Public holidays differ by country and often by region or state. Some move each year, such as Easter and Eid, and some are observed on the nearest weekday when they fall on a weekend. Check the official calendar for the places you do business in.
If you work across several countries, run the calculation separately for each, with its own holiday list, and use the later date for commitments.
Counting inclusively or not
Whether a count includes the start date varies by context. Contracts often exclude it, while project plans include it. This tool counts both ends when they're working days, so subtract one if your rule excludes the start.
Questions
Are weekends always Saturday and Sunday?
Sunday is always off; tick the option to treat Saturday as a working day.
Does it know public holidays?
No, you add the dates yourself.