GUIDE · 2026-07-22
How to use the Business Day Calculator
Measure deadlines, delivery windows and leave in actual working days. The result follows “Calendar days − weekends − entered weekday holidays = business days” and is designed for situations such as count working days in a project. Inputs are handled immediately in your browser with no account required.
How it works
Calendar days − weekends − entered weekday holidays = business days
Most processing stays in your browser instead of sending inputs to our server. Verify important financial or contractual decisions against an authoritative source.
Useful examples
- Count working days in a project
- Check a delivery window
- Exclude holidays from annual leave
Frequently asked questions
Are public holidays automatic?
No. Holiday calendars vary by country, so enter the dates you want to exclude, one per line.
Are both endpoints included?
Both dates are included by default. You can turn off the end-date option.