Free Online Business Days Calculator Tool
Calculate the number of business days between two dates or add/subtract working days to find a deadline date. Excludes weekends automatically. Perfect for project planning, contract deadlines, proposal timelines, and work scheduling. 100% private.
Weekends excluded automatically · 100% client-side
How to Use the Business Days Calculator Tool
Choose Calculation Mode
Select 'Count Business Days' to find how many working days are between two dates, or 'Add Business Days' to find a deadline date.
Enter Your Dates
For counting, pick start and end dates. For adding, pick a start date and enter the number of working days to add.
View Results Instantly
See the total business days counted, or the calculated deadline date. All weekends are automatically excluded.
Powerful Business Days Calculator Features
Everything you need to calculate working days and deadlines — all in one free tool.
Count Business Days
Calculate the exact number of business days (Monday-Friday) between any two dates.
Add Business Days
Add a specific number of working days to a start date to find the exact deadline date.
Subtract Business Days
Subtract working days from a date to find a past date, counting backwards excluding weekends.
Weekend Exclusion
Automatically excludes Saturdays and Sundays. Know exactly how many working days remain.
Total Calendar Days
See both business days and total calendar days for complete context.
Copy Results
Copy the calculated result to your clipboard with a single click.
Clear & Reset
Reset all fields instantly to start a new calculation.
100% Client-Side
All calculations happen in your browser. Your data stays private.
Why Use Our Business Days Calculator Tool
The most reliable way to calculate working days and deadlines. Accurate, fast, and private.
100% Free
No hidden fees, no usage limits. Calculate as many business days as you need.
Weekend-Aware
Automatically excludes Saturdays and Sundays for accurate workday counting.
Bidirectional
Count business days between dates OR find a deadline by adding/subtracting days.
No Installation
Works entirely in your browser. No downloads, no plugins, no setup.
Key Highlights
- No sign-up required
- 100% client-side
- Count or add/subtract mode
- Automatic weekend exclusion
- Works on any device
- Instant results
Frequently asked questions
What are business days?
Business days are the days of the week when most businesses operate — Monday through Friday. Weekends (Saturday and Sunday) are excluded from business day calculations.
Is this business days calculator really free?
Yes, completely free. No hidden charges, no usage limits.
What's the difference between count and add modes?
Count mode tells you how many business days are between two dates. Add mode takes a start date and a number of business days, then calculates the exact end date by skipping weekends.
Does this account for holidays?
This tool automatically excludes weekends only. For holidays (which vary by region), you may need to manually adjust the result. A future update may include holiday support.
Can I calculate backwards?
Yes! Use Subtract mode to go backwards from a date. For example, subtract 10 business days from today to find what date it was 10 working days ago.
Do I need to install anything?
No installation required. Works entirely in your web browser.
Can I use this on my phone?
Yes, fully responsive and works on all devices.