Business Days Calculator
Count working days (Monday–Friday) between two dates, or add working days to a start date.
Business days between two dates
Add business days to a date
About the Business Days Calculator
The Business Days Calculator counts the working days between two dates, excluding Saturdays and Sundays, or adds a number of business days to a start date to find a deadline. It is useful for delivery estimates, notice periods, invoice terms and legal timelines expressed in working days.
A business day here means Monday to Friday. Public holidays differ by country, region and company, so they are not excluded automatically; if holidays matter, subtract them manually from the count or move the end date. Whether the start day counts also varies by contract, so read how your agreement defines it.
How to use it
- Choose whether you want to count days between dates or add days to a date.
- Enter the start and end dates, or the start date and the number of business days.
- Read the result.
- Adjust for known holidays.
Tips and good to know
- A period of five business days usually spans seven calendar days when it includes a weekend.
- Some countries have a Friday and Saturday weekend; this tool assumes Saturday and Sunday.
- Always confirm the counting rule in your contract.
Frequently asked questions
Are public holidays excluded?
No; subtract them yourself.
Is the start date included?
Check the option or note on screen; the convention differs between uses.
Can it handle long periods?
Yes, it works across years.