What does this tool do?
The Business Days Calculator counts the number of working days between two dates by skipping weekends (Saturday and Sunday), or adds a given number of business days to a start date to find the resulting date. It is useful for anyone planning project deadlines, payment terms or delivery windows.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Two working modes
In 'Add business days' mode you enter a start date and a number of business days to add; the tool skips weekends and shows the resulting date with its weekday, so a due date is calculated automatically. In 'Count between dates' mode you pick a start and end date, and the tool shows both the number of business days in between and the total calendar days separately. Both dates are included in the count, and you can copy any result with one click.
Typical uses and limits
Use it to find the deadline when an invoice is due in 30 business days, to plan a contractual delivery time, or to see how many working days fall between two dates. The calculator only excludes weekends; it does not automatically subtract public holidays, so you should account for country-specific holidays separately. All calculations run locally in your browser.
Frequently asked questions
Are public holidays taken into account?
No, the tool only treats Saturday and Sunday as non-working days. You need to add country-specific public holidays to the result manually.
Are the start and end dates included in the count?
Yes, in 'Count between dates' mode both the start and end dates are counted when they fall on a weekday.
How is the resulting date shown?
The result is shown with the weekday, day, month and year in your language's format (for example 'Monday, 15 June 2026') and can be copied.
Is Business Days Calculator free?
Yes. Business Days Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Business Days Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.