WIN-J TOOLS
Business day calculator
Add or subtract business days excluding weekends and your custom holidays.
Free · No installation
Input files and content are processed in your browser.
How to use
- Add or subtract business days excluding weekends and your custom holidays.
- Adjust the settings and generate the result.
- Review the result, then copy or download it.
Example
One business day after Friday 2026-10-09 is 2026-10-12 without additional holidays.
Method and limitations
The start date is excluded; zero returns it unchanged. National holidays are not automatic—enter them yourself. Calendar dates ignore time zones and clock time. Supports ±10,000 business days.
Frequently asked questions
Are my inputs stored on the server?
The tool processes files and input locally without uploading or saving them. Reloading the page clears the workspace.
What should I check before using the result?
The start date is excluded; zero returns it unchanged. National holidays are not automatic—enter them yourself. Calendar dates ignore time zones and clock time. Supports ±10,000 business days.