Working Days Calculator

Count working days between dates or find a future date by business days

What is it and how does it work?

A working days calculator counts the business days between two dates — or finds a future date a given number of working days away — by skipping weekends and, when needed, public holidays. Business deadlines are almost never measured in calendar days: "payment within 30 days", "delivery in 5 working days" or a notice period all mean working days, and counting them by hand means flipping through a calendar crossing off Saturdays and Sundays. This does it instantly and accurately.

The distinction between calendar days and working days trips people up constantly, because a "10-day" turnaround can land nearly two weeks later once weekends are excluded, and longer than that across public holidays. The calculator handles both directions: count the working days within a date range, or add a number of business days to a start date to find when a deadline actually falls. This runs in your browser, so you can plan deadlines, SLAs and notice periods without doing the weekend arithmetic yourself.

Common use cases

• Finding a deadline date: add 10 working days to today to see the real date a 10-business-day task is due.
• Counting working days in a range: find how many business days fall between a project start and end date.
• Planning notice or payment terms: work out the calendar date a "within 30 working days" obligation reaches.

Frequently asked questions

What is the difference between calendar days and working days?

Calendar days count every day including weekends; working days count only Monday to Friday (and exclude public holidays where applied). A 10 working day period spans two weekends, so it lands about two weeks later than 10 calendar days would.

Does it account for public holidays?

Weekends are always excluded; public holidays depend on the calculator and the region you select, since holidays differ by country and sometimes by state. For an exact business deadline, make sure the relevant holidays for your location are included.

Why does a "10-day" deadline land almost two weeks later?

Because if it means 10 working days, the two weekends in between are skipped, adding four non-counted days. This is exactly why confirming whether a deadline is in calendar or business days matters — the gap between the two grows the longer the period.

Can it count backwards from a deadline?

Many working-day calculators support both directions: adding business days to a start date to find a deadline, or subtracting them from a known deadline to find the latest start date. Counting backwards is useful for working out when you must begin to finish on time.

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