Date & Time Tools

Business Days Calculator

Count the number of business days (Monday–Friday) between two dates, excluding weekends.

First date

Second date

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Choose what you want to do: add days, subtract days, or find days between two dates.
Enter the date(s) involved.
Read the resulting date or day count — leap years and varying month lengths are handled automatically.

Formula / logic

Days between = (later date − earlier date) in whole days. Add/subtract = start date shifted forward or backward by N days on the calendar.

Worked example

From January 1 to December 31 in a non-leap year is 364 days. Adding 30 days to January 1 lands on January 31.

This version excludes weekends only. Add or subtract known holidays manually for your region if precision matters.

Yes, the calculation uses real calendar dates, so February 29 in a leap year is counted correctly.

The count reflects full days elapsed between the two dates; the start date itself counts as day zero.

Yes — every calculator on this site is free, with no sign-up or download required.

Yes, the layout and calculator both adapt to phone and tablet screens.