Business Days Calculator
Free, locally-processed business days calculator for fast and secure results.
Runs locally in your browser
Your inputs are processed locally in your browser and are not uploaded or stored by us.
Calculate the exact number of business days (Monday to Friday) and weekends between any two dates.
How to use the Business Days Calculator
- Enter the start date.
- Enter the end date.
- Select Calculate to see the exact count of business and weekend days.
Calculation methodology
Business Days = Total Calendar Days − Weekend Days
The calculator measures the exact span between the two dates and counts every Monday through Friday. It explicitly includes both the start date and end date in the calculation.
Worked example
Start dateMonday, September 28
End dateFriday, October 2
Calendar span: 5 days
Business days: 5
Weekend days: 0
Result: 5 business days
Notes
- Are endpoints included? Yes. Monday to Friday counts as exactly 5 business days.
- Are public holidays excluded? For Version 1, business days are defined purely geographically as Monday through Friday. National or regional holidays are not deducted.