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.
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Is my data uploaded?
No. All math runs locally in your browser.
Is this tool free?
Yes. No account or subscription required.