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Work Days Calculator
Your dates
Example: January 1 to April 1, 2026 has 64 work days (weekdays only, weekends skipped). Add 10 work days to January 1, 2026 and you land on Thursday, January 15, 2026.
Behind the numbers
How work days are counted
A work day is a weekday, Monday through Friday. This calculator counts the work days after the start date through the end date, so the start date itself is not counted and the end date is. In add mode it steps forward one calendar day at a time, counting only weekdays, until it has counted the number you asked for.
Jan 1 to Apr 1, 2026 = 64 weekdays − 0 holidays = 64 work days
Jan 1, 2026 (Thursday) + 10 work days = Jan 15, 2026 (Thursday)
A few comparisons
Worked examples
| Calculation | Result |
|---|---|
| Work days, Jan 1 → Apr 1, 2026 (0 holidays) | 64 work days |
| Work days, Jan 1 → Jan 9, 2026 (1 holiday) | 5 work days |
| Work days, Feb 2 → Feb 13, 2026 (0 holidays) | 9 work days |
| Jan 1, 2026 + 10 work days | Thu, Jan 15, 2026 |
| Mar 6, 2026 + 5 work days | Fri, Mar 13, 2026 |
Work days, without the guesswork.
A span of one full week, Monday to Friday, always has 5 work days, no matter which week it is.
Count holidays only if they fall on a weekday inside your span. A holiday on a Saturday or Sunday changes nothing.
Adding work days to a Friday skips the weekend: 1 work day after Friday is Monday, not Saturday.
For a deadline, work backwards instead: count work days from the due date to today to see how many working days you have left.
Good to know
Your work days questions, answered.
What counts as a work day?
A work day is a weekday, Monday through Friday. Saturdays and Sundays are never counted. Public holidays are only excluded if you enter them in the holidays box.
Does the calculator count the start and end dates?
It counts the work days after the start date through the end date. January 1 to April 1, 2026 is 64 work days: January 1 itself is not counted, and April 1 is counted.
How does adding work days work?
It steps forward one calendar day at a time and counts only weekdays. Adding 10 work days to Thursday, January 1, 2026 lands on Thursday, January 15, 2026.
What if the end date is before the start date?
Swap the dates: the end date must be after the start date. If you need a span that runs backwards, enter the earlier date first.