Count weekdays between two dates to plan projects and deadlines accurately.
Business Days
23days
Total Calendar Days31
Weekend Days8
Weeks5
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What is the Business Days Calculator?
A business days calculator is a date tool that computes the number of working days between two dates by excluding weekends (Saturday and Sunday) and optionally removing public holidays or custom non-working days. It's essential when timelines matter commercially—project managers use it for deadlines, HR teams use it for leave calculations, and support teams use it for service-level agreement windows.
How it works
Enter a start date and an end date. The calculator counts each day between them, removes all Saturdays and Sundays, and subtracts any holidays you specify. The result is the net working days available. Some calculators let you mark custom closed days (like company shut-down weeks) or define business hours within those days.
Examples
Input
Result
Notes
Start: Monday, 1 September 2025 → End: Friday, 5 September 2025
5 business days
Straight week with no holidays; all five weekdays count
Start: Friday, 5 September 2025 → End: Monday, 8 September 2025
2 business days
Weekend (Saturday 6, Sunday 7) is skipped; only Friday + Monday remain
Start: Friday, 1 August 2025 → End: Friday, 29 August 2025, minus 15 August (holiday)
20 business days
Four Fridays, four Mondays, plus surrounding mid-week days, minus one holiday
How to use the Business Days Calculator
Select or type your start date (the day work or a period begins)
Select or type your end date (the deadline or final day)
Toggle any known holidays or non-working days you want excluded
Click Calculate to see the total business days
Review the breakdown to verify weekends and holidays are correctly removed
Use the result for your project plan, contract, or report
Benefits
Accurate project timelines—no more miscounting days across weekends
Faster payroll and leave calculations—HR teams save hours each month
SLA compliance—track response windows correctly for customer contracts
Avoids missed deadlines caused by forgetting that weekends don't count
Adjustable for your company's holidays—not everyone observes the same closures
Instant results—no manual day-by-day counting or spreadsheet formulas needed
Tips & common mistakes
Common mistakes
Forgetting that weekends don't count—many people add all 7 days then subtract, missing that Friday–Monday jumps 2 days
Using calendar days instead of business days in contracts or SLAs—leads to missed deadlines and disputes
Not accounting for regional or company-specific holidays—a one-day oversight compounds across multiple timelines
Assuming the same business day count across time zones—customers in different regions may observe different holidays
Tips
Copy the result directly into your project management tool (Asana, Monday, Jira) to keep timelines in sync
Add a 1–2 business day buffer for review and approval cycles—the math gives you working capacity, not calendar breathing room
Use the calculator before negotiating SLA response times—quote realistic windows based on actual business hours
Check the holiday list annually—public holidays shift (e.g., Easter) and companies add new closures (company summit weeks)
Frequently asked questions
Do business days include the start and end date?
Yes, both the start and end dates are counted as full working days if they fall on a weekday. If either lands on a weekend, it's excluded.
Can I exclude more than just weekends and holidays?
Some calculators let you mark custom dates (e.g., office shut-downs or team conference weeks). Check the tool's options; at minimum, all weekends are automatically removed.
What if my company works six days a week?
This calculator assumes a standard Monday–Friday week. If you work Saturdays, you'll need to manually add those days back or use a custom time-tracking tool.
How do I use this for payroll?
Calculate business days between the pay period start and end dates, then multiply by daily wages (if hourly, first multiply hours per day). Exclude any unpaid holidays.
Is this the same as working hours or billable hours?
No. This tool counts full working days (e.g., 8 hours each). For billable hours or partial days, divide the result by the total hours you want to track.
Why does my answer differ from Excel's NETWORKDAYS function?
Excel's NETWORKDAYS expects date formats very precisely and can behave differently with time zones or non-standard input. This calculator is more forgiving and shows holidays visibly.