Business Days Calculator
Count working days between two dates or add business days to a date, with weekend presets, your own holidays and inclusive or exclusive ranges.
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About the Business Days Calculator
Business Days Calculator counts the working days between two dates, or finds the date that falls a given number of business days after a start date. It shows the full breakdown — calendar days, weekend days and holidays removed — so you can see exactly how the result was reached.
Choose which days are your weekend (Saturday and Sunday, Friday and Saturday, Sunday only, or any custom combination), decide whether the start and end dates themselves should count, and add any holiday dates that apply to you. Public holidays are not included automatically, because they differ by country, state and employer — only the dates you add are excluded.
How to use
- Choose “Business days between two dates” or “Add business days to a date”.
- Enter the dates. For a range, tick or untick “Include the start date” and “Include the end date”.
- Pick a weekend preset, or choose Custom weekdays and tick your non-working days.
- Optionally add holiday dates one at a time; remove any with its Remove button.
- Click Calculate, then copy or download the summary.
Key features
- Two modes: count working days in a range, or add business days to a date.
- Visible options to include or exclude the start and end dates.
- Weekend presets for Saturday–Sunday, Friday–Saturday and Sunday-only weeks, plus any custom combination.
- Your own holiday list, with holidays that fall on a weekend never counted twice.
- Step-by-step breakdown: calendar days − weekend days − holidays = working days.
- Copy Summary and Download Summary as plain text.
Best practices
- Check your organisation’s or court’s rule on whether the first and last days count before relying on a deadline.
- Add every public or company holiday that applies to your location — none are added for you.
- For deadlines “within N business days”, use Add business days; counting starts on the next day.
- Use the Friday–Saturday preset for regions where the weekend falls on those days.
- Save the downloaded summary with the document or contract it relates to.
Benefits
- Avoids miscounting weekends and holidays by hand on a calendar.
- Transparent breakdown you can share or double-check.
- Works for any weekend pattern used around the world.
- Runs entirely in your browser; nothing is stored or sent.
Frequently asked questions
Does it include public holidays automatically?
No. Holidays vary by country, state and employer, so the tool only excludes the holiday dates you add yourself.
Are the start and end dates counted?
You decide. Tick or untick “Include the start date” and “Include the end date”; the result always states which option was used.
How does “Add business days” count?
Counting starts on the day after the start date, and only working days are counted. Adding 1 business day gives the next working day; adding 0 returns the start date.
What happens if a holiday falls on a weekend?
It is already a non-working day, so it is not subtracted a second time. The result lists such dates separately.
Can I use a Friday–Saturday or Sunday-only weekend?
Yes. Choose a preset, or select Custom weekdays and tick any combination of days — at least one day must remain a working day.
How far apart can the dates be?
Up to 100 years. Dates are counted as whole calendar days, so time zones and daylight-saving changes do not affect the result.