Working Days Calculator — Free Online Tool
Calculate the number of working days (weekdays) between any two dates, optionally excluding a custom holiday list. Also supports the reverse: add N working days to a start date to find the end date. Shows calendar days, weekends, and holidays excluded.
100% client-side. No uploads. Your data never leaves your browser.
How to use Working Days Calculator
- Enter start and end dates.
- Toggle 'Exclude Weekends' (always on) and optionally add holidays.
- See working days, calendar days, and excluded dates.
- Switch to 'Add Days' mode to calculate a future date.
Frequently Asked Questions
What counts as a working day?
Monday through Friday (weekdays), excluding any dates in your holiday list.
Can I exclude public holidays?
Yes. Toggle 'Use US Holidays' for a pre-loaded 2024 US holiday list, or enter custom holiday dates (one per line, YYYY-MM-DD format).
What does 'Add N working days' mode do?
Enter a start date and number of working days to find the resulting end date — useful for project deadline calculations.
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