HolidayDB calculators
These calculators are backed by HolidayDB public holiday data. Use them in the browser for quick checks, or use the API documentation links to integrate in your own software.
| Calculator | What it does | API docs |
|---|---|---|
| Business days calculator | Count working days in a month or year, with ISO weekdays and optional subdivision public holidays. | Documentation |
| Working hours calculator | Compute working minutes/hours for a range or calendar month/year using the same holiday rules plus a workday duration. | Documentation |
| Salary proration calculator | Prorate a salary by working days in a window inside a payroll period, excluding weekends and public holidays. | Documentation |