About this business days calculator
Count working days between two dates, excluding weekends and optional holidays. Every weekday from the start date through the end date counts as a business day, inclusive of both endpoints. Any date you list as a holiday is excluded from the count when it falls on a weekday inside that range. Use this workspace to prepare a result you can review before putting it to use. All processing takes place on your device, without an account or an upload of your inputs. Check the examples to understand the expected output, read the limitations for the supported scope, and reset the form when you want to start a separate task.
How the business days calculator works
Every weekday from the start date through the end date counts as a business day, inclusive of both endpoints. Any date you list as a holiday is excluded from the count when it falls on a weekday inside that range.
Business Days Calculator examples
1–30 Sep 2026, no holidays
22 business days out of 30 calendar days
24–26 Dec 2026, with 25 Dec listed as a holiday
1 business day out of 3 calendar days
Limitations & privacy
Covers a single fixed Monday–Friday work week only; it does not support alternate weekend patterns or region-specific holiday calendars. Use a range of at most 100 years and at most 366 listed holidays.
Inputs and results stay in this browser. Only tool identifiers are stored for your recently used tools. You can clear that history from the directory.
Business Days Calculator: frequently asked questions
How does the business days calculator work?
Every weekday from the start date through the end date counts as a business day, inclusive of both endpoints. Any date you list as a holiday is excluded from the count when it falls on a weekday inside that range.
What can I inspect in the business days calculator result?
The calendar breakdown helps you check the result before using it. Covers a single fixed Monday–Friday work week only; it does not support alternate weekend patterns or region-specific holiday calendars. Use a range of at most 100 years and at most 366 listed holidays.
Does the business days calculator upload my input?
Processing happens in your browser. No tool input or output is uploaded to a server. Use Reset to clear the current workspace before starting a separate task.
Updated September 26, 2026