Add working days to a date
Start from any date, add or subtract a number of working days, and get the resulting date with weekends skipped automatically. Ten working days from today is two full weeks out, and this shows exactly where it lands.
Deadlines, SLAs and delivery windows
This is the calculation behind most business promises: a support ticket answered within three working days, goods shipped within ten, an invoice due thirty working days after receipt. The arithmetic is easy until the count crosses weekends, and every crossing pushes the real date further than intuition suggests. Twenty working days is not three weeks; it is a full four.
Subtracting is just as useful and less obvious. If a filing is due on the 28th and preparing it takes eight working days, entering minus eight from the deadline shows the last responsible day to start. Planners who work backwards from deadlines catch impossible schedules while they can still be fixed.
The counting convention matches the workdays-between calculator: the start date itself is not consumed, so adding one working day to a Monday gives Tuesday. Weekends are Saturday and Sunday, and public holidays are deliberately left to you, since they depend on the country involved.
FAQ
What happens when the count crosses a weekend?
Weekend days simply don't consume any of the count. Adding one working day to a Friday gives the following Monday; adding five gives the Friday after.
Can I subtract working days?
Yes, enter a negative number. Ten working days before a deadline tells you the latest sensible start date.
Are holidays taken into account?
No, only weekends, because holiday calendars differ by country. For dates that matter legally, check the local public holidays on top of this result.