Business Days Calculator
Free online Business Days Calculator. Calculate working days between two dates, excluding weekends and custom holidays. Perfect for project planning.
100% Private (In-Browser)Instant Web Worker SpeedZero Server Upload
Business Days Calculator by Privacy-First Toolbox is a 100% free, client-side browser utility. It processes your files locally on your computer or smartphone using HTML5 and Web Workers—zero bytes of your files or data are ever uploaded to any external server.
Enter YYYY-MM-DD, one per line.
Calendar View
Holiday
Weekend
Key Features
- Exclude weekends
- Custom holidays support
- Total business days
- Calendar vs Business days
Common Use Cases
- Project deadlines
- Shipping estimates
- Leave calculation
Frequently Asked Questions
🔒100% Client-Side: Project timelines and business days calculate locally with zero tracking.
More Date & Time
Other private client-side utilities in this collection.
Unix Timestamp Converter
Convert Unix Timestamps to Human-Readable Dates
Time Difference Calculator
Calculate duration between two dates
Time Zone Converter
Convert time across multiple time zones
Date Format Converter
Parse and format dates into standard strings
Week Number Calculator
Find ISO week number for any date
Age Calculator
Calculate exact age & next birthday