Free Business Days Calculator
Count weekdays between two dates, or add business days to a start date — no signup, nothing sent to a server.
Business days
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How to use the business days calculator
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1
Pick a calculation type
Choose "Days between dates" or "Add business days" from the tabs above.
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2
Enter your dates
Fill in the start and end date, or the start date and number of days to add.
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3
Read the result
The business day count or resulting date updates instantly as you change the inputs.
Example use cases
Project deadlines
Work out a realistic deadline by adding working days to a start date.
Shipping & delivery estimates
Calculate expected delivery dates that skip weekends.
Payroll & SLA tracking
Count business days between two dates for turnaround or SLA reporting.
Frequently asked questions
How are business days counted?
Business days are Monday through Friday. Saturdays and Sundays are excluded from the count.
Does this account for public holidays?
No, only weekends are excluded — public holidays vary by country and region, so they aren't built in. Subtract known holidays manually if needed.
How does "Add business days" handle weekends?
It steps forward one calendar day at a time, only counting weekdays toward the total, so the result always lands on a weekday.
What does "include start date" do?
When checked, the start date itself counts as day one (if it's a weekday). When unchecked, counting begins the day after the start date.
Is anything I enter sent to a server?
No. Every calculation runs entirely in your browser — nothing is transmitted or logged.