Count the number of business days (weekdays) between two dates — useful for estimating delivery times, project deadlines, or processing windows quoted “in business days.”
How it works
Every day from the start date through the end date, inclusive, is checked — Saturdays and Sundays are excluded, and everything else counts. A Monday-to-Friday span of one work week counts as 5 business days.
What this does not include
This excludes weekends only. It does not exclude public holidays, since which days are holidays depends on country, region, and industry — a figure this calculator can’t assume without guessing.
How to use this calculator
- Enter the start date.
- Enter the end date.
A worked example
From Monday Sept 14, 2026 to Friday Sept 18, 2026: 5 business days, weekends excluded.
From Saturday Sept 12 to Sunday Sept 13, 2026 (a weekend-only span): 0 business days.
What the variables mean
| Variable | Meaning |
|---|---|
| Start date, end date | The date range being measured |
Edge cases worth knowing
Weekends are always excluded, but public holidays generally aren’t unless the calculator specifically supports them — a span that includes a holiday will still count it as a business day by default.
An end date before the start date has no valid business-day count — the calculator declines to show a result rather than a negative or nonsensical figure.
Is the start date included in the count?
Yes — both the start and end dates are counted if they fall on a weekday, matching how “5 business days from Monday” is commonly understood.
Why doesn’t this exclude holidays?
Public holidays vary by country and even by industry, so hardcoding a specific holiday calendar would give a wrong answer for many readers — weekends are the one exclusion that’s universal.
How do I account for holidays myself?
Subtract one business day from the result for each holiday that falls within your date range and lands on a weekday.
