What is a Working Days Calculator?

A Working Days Calculator counts the number of business days between two dates, excluding weekends and any public holidays you specify. It is an essential tool for project managers, HR professionals, procurement teams, and anyone who needs to calculate deadlines, delivery windows, notice periods, or contractual timeframes in working days rather than calendar days.

Unlike a simple date difference calculator, this tool skips Saturday and Sunday (and any holidays you enter), giving you a count that reflects actual business operations.

How Does the Calculator Work?

1. Loop through each day — The calculator iterates day-by-day from the start date to the end date.
2. Check day of week — If "Exclude Weekends" is enabled, Saturday (day 6) and Sunday (day 0) are skipped.
3. Count valid days — Every day that passes the weekend filter is counted as a working day.
4. Subtract holidays — The number of public holidays you specify is deducted from the working day total.

Example Calculation

Benefits of Using This Tool

• Deadline planning — Calculate exactly when a 30-day or 90-day business-day deadline falls.
• Project scheduling — Know the real working duration of a project sprint or phase.
• HR & payroll — Determine the number of payable working days in a period.
• Legal & contractual — Many contracts specify notice or payment terms in "business days".
• Holiday customisation — Enter the number of public holidays in the period to get a country-specific result.