Business days calculator
Count calendar days and business days (Mon–Fri) between two dates, with optional custom holidays.
From date
To date
Custom holidays (YYYY-MM-DD, comma-separated)
Optional — add dates to exclude from business days.
Result
Calendar days: 955
Business days: 683
How to use
1. Pick start and end dates.
2. Optionally list extra non-working dates.
3. Read calendar and business day counts.
Example
Business days calculator
Count calendar days and business days (Mon–Fri) between two dates, with optional custom holidays.
When to use
• When you need a quick estimate without spreadsheets.
• When you want privacy — calculations stay on your device.
Limitations
• When you need certified engineering or legal calculations.
• When site-specific conditions require a professional survey.
About this calculator
Count calendar days and business days (Mon–Fri) between two dates, with optional custom holidays.
Preguntas frecuentes
Is my data uploaded?
No. All math runs locally in your browser.
Is this tool free?
Yes. No account or subscription required.