Date & time
Business Days Calculator
Count weekdays between two dates, excluding weekends and your entered holidays. Nothing you enter leaves your browser.
Enter your values, then calculate.
What this tool does
About the Business Days Calculator
Count weekdays between two dates, excluding weekends and your entered holidays. It helps make date, duration, and timezone work explicit so that assumptions can be checked before the result is reused.
The calculation uses start date, end date, counting method, and holidays to exclude (yyyy-mm-dd, one per line).
How to use it
- Review the starting values for start date, end date, counting method and replace them with your own.
- Choose any available units or assumptions, then select “Calculate.”
- Read the labeled result, compare another scenario if needed, and copy the output for your notes.
Practical example
Start with a known input
The workbench starts with a complete scenario: Start date: 2025-01-01 End date: 2025-12-31 Counting method: inclusive Holidays to exclude (YYYY-MM-DD, one per line): Change one assumption at a time to see how it affects the result.
What to know about the result
- Weekends are Saturday/Sunday. Enter your own holiday dates; no national holiday calendar is loaded automatically.
- Results are estimates based only on the supplied values. Rounding, fees, local rules, and real-world conditions may change the final outcome.
Common questions
Using the Business Days Calculator
Is the Business Days Calculator free to use?
Yes. FormatCalc's Business Days Calculator is free to use with no account required.
Is my data private when I use the Business Days Calculator?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the Business Days Calculator?
Enter your values, select any units, and choose Calculate. You can then copy the result.
What should I check before using the result?
Weekends are Saturday/Sunday. Enter your own holiday dates; no national holiday calendar is loaded automatically. Results are estimates based only on the supplied values. Rounding, fees, local rules, and real-world conditions may change the final outcome.