Online Receipt Generator
Payment Terms & Late Payments

Business Days Calculator

Add business days to a date, or count the business days between two dates — minus holidays.

Result

Result date

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Calendar days

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Embed this calculator on your site

Copy this code and paste it into your page's HTML. The calculator is free to use and resizes itself to fit.

How it's calculated

Saturdays and Sundays are skipped. Public holidays vary by country, so enter how many fall on weekdays in the range: each one is excluded from the count, or pushes the result date one business day later. The start date itself is not counted.

This business days calculator adds working days to a start date, or counts the working days between two dates. Weekends are skipped. You can also enter a number of public holidays to exclude.

The formula

Add mode:      move forward one day at a time
               skip Saturday and Sunday until the target count is reached
               target = business days to add + holidays
Between mode:  business days = weekdays after the start date, up to and including the end date
               minus holidays
weekend days = calendar days - weekdays

The start date is never counted.

Worked example

Add mode. Start date Monday 2026-03-02. Add 10 business days.

  • Result date: 2026-03-16
  • Calendar days: 14

The two weekends in between add 4 calendar days. With 1 public holiday on a weekday, the result moves one business day later.

  • Result date: 2026-03-17

Between mode. Start 2026-03-02, end 2026-03-31.

  • Business days: 21
  • Weekend days: 8
  • Calendar days: 29

How to read the result

Business days are a unit of time you must define in writing. "Within 10 days" can mean calendar days. "Within 10 business days" cannot be read that way.

Holidays are a count, not a list. Enter only the holidays that fall on a Monday to Friday inside your range. A holiday on a Saturday is already skipped.

For a date range, remember that the start date is excluded. Two adjacent weekdays give 1 business day, not 2.

Bank cut-off times and regional working weeks can differ. A payment sent on Friday evening may arrive on Tuesday. Add buffer time when a deadline matters.

Contracts and local law may define business days in their own way. Check the exact wording before you rely on a date.

Related tools

Frequently asked questions

How do I add business days to a date?
Count forward one day at a time and skip Saturdays and Sundays. Ten business days after Monday 2 March 2026 is Monday 16 March 2026.
Does the start date count as a business day?
No. The count starts on the day after the start date. The end date is included when you count between two dates.
How do I handle public holidays?
Enter how many public holidays fall on weekdays in your range. Holidays differ by country, so the calculator does not know them. Each one is subtracted from a count or moves a result date one business day later.
Are Saturdays business days?
Not here. The calculator treats Saturday and Sunday as non-working days. Some businesses work on weekends. Those need a different calculation.
When do I use business days instead of calendar days?
Use them for delivery times, processing times and bank transfers. Payment terms like Net 30 usually use calendar days. Write the unit in your contract.