Business Days Calculator

Count working days between dates or add/subtract business days from a starting date. Customize the workweek, choose inclusion rules, and enter your own holidays instead of relying on a fixed Monday-Friday assumption.

Workday planning

Count or add business days

Customize working weekdays and your own holiday dates instead of assuming every schedule uses Monday-Friday.


Use YYYY-MM-DD. Holiday dates that already fall on a non-working weekday are not double-counted.

What is a business day?

A business day is not universal. Many organizations use Monday through Friday, but some workplaces operate on different weekdays. This calculator therefore lets you choose the exact workweek.

Counting business days between two dates

The count mode checks every calendar date in the selected range. A date counts when its weekday is enabled and it is not listed as a custom holiday.

Add or subtract business days

The second mode answers questions such as "What date is 10 business days from today?" The calculator moves through the calendar and skips any weekday or custom holiday you have excluded.

Public holidays

Public-holiday calendars differ by country, state, province, and sometimes municipality. This page does not guess your jurisdiction. Instead, enter the exact holiday dates relevant to your calculation.

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Frequently asked questions

What counts as a business day?

In this calculator, a business day is any weekday you mark as a workday that is not one of the custom holiday dates you enter.

Does the calculator know public holidays automatically?

No. Public holidays vary by country and region. Add the exact holiday dates you want excluded in the custom holidays box.

Can I use a non-standard weekend?

Yes. Choose exactly which weekdays count as working days.

Can I add business days to a date?

Yes. Use the Add or subtract mode to move forward or backward by a number of business days.

Can I include the end date when counting?

Yes. Use the include-start and include-end options to match the counting convention you need.

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