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Business Days Calculator

Count business days between dates or add/subtract business days, with holiday calendars for 15 countries.

Business days calculator

Excludes weekends and public holidays
Mode
What do you want to do? ?
Dates
Start date —
End date —
Work week & holidays
Country (holidays) ?
Work-week preset ?
Working days

Formula

BD = CalDays − NonWork − Holidayswork
BD
Business days in the range
CalDays
Total calendar days between start (inclusive) and end (exclusive)
NonWork
Weekend / non-working weekdays based on your work-week setting
Holidayswork
Public holidays that fall on a working day (so they're not double-counted)
Worked example — your numbers
  1. Range: —
  2. Calendar days: —
  3. Non-working weekday count: —
  4. Holidays on working days: —
  5. Business days = —

The algorithm iterates each day in the range, skipping weekends (or whichever days you've unmarked as working) and matching country holidays. Observed-on-Monday rules and regional / state-level holidays are not modelled — for contractual deadlines, cross-check against the official calendar.

Examples

How It Works

Business days are working days — typically Monday through Friday, excluding public holidays. This calculator has two modes:

Count mode iterates through each day in the range and counts only those that are (a) in your configured work week and (b) not a public holiday for the selected country. The result tells you how many actual working days fall between two dates.

Add mode starts from a date and counts forward (or backward for negative numbers) by business days, skipping weekends and holidays. This is useful for deadlines — "10 business days from today" accounts for weekends and holidays.

Holiday data includes both fixed holidays (same date every year, like July 4th) and variable holidays (different dates each year, like Thanksgiving or Easter). Data covers 2025-2026 for 15 countries.

Tips & Best Practices

Use 'Add Days' mode for deadline calculations — '10 business days from today' is more useful than manually counting on a calendar.
The work week is configurable — uncheck days to exclude them. Some countries work Sunday-Thursday instead of Monday-Friday.
For project planning, always specify which country's holidays apply — a US holiday isn't a UK holiday.

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Frequently Asked Questions

Which holidays are included?

Major national/federal holidays for 15 countries with specific dates for 2025-2026. Variable holidays (Easter, Thanksgiving, etc.) have pre-computed dates. State/regional holidays are not included.

Yes — check or uncheck any day. Default is Monday-Friday. For Middle Eastern schedules, uncheck Fri-Sat and check Sun. You can even set a 4-day work week.