Business Days Calculator
Count the working days between two dates with your own weekend and your own days off, or find the date N business days away. Free, in your browser, no upload.
🔒 Counted in your browser — no dates are uploaded.
How many working days, and which date
Pick a start date and an end date and the calculator instantly counts how many working days, weekend days and days off fall in that span. What counts as the weekend is yours to set — Saturday and Sunday, Friday and Saturday, Sunday alone, or none at all — and any days the office is closed can be typed in and are taken off the working total. It also works the other way round: give it a date and a number of business days and it tells you the date that lands on, and which day of the week that is. Both endpoints are included, so a Monday-to-Friday range counts five business days, and a range that starts and ends on the same weekday counts one. This answers everyday questions like "how many working days until this deadline?" or "how many weekdays are in this billing period?" without counting squares on a calendar. The order of the two dates does not matter — put the later date first and you still get the same totals.
How the count is calculated
The tool walks the range one day at a time from the earlier date to the later date and sorts each one: a weekend day by your chosen rule, a day off if you listed it, and a working day otherwise — so every day in the span is counted exactly once and the three add up to the total. A day you list that already falls on a weekend is not subtracted twice. Each step is measured at UTC midnight, so a daylight-saving-time change in your local zone can never skip a day or count one twice.
Frequently asked questions
Are the start and end dates both counted?
Yes. The range is inclusive of both endpoints. With the default Saturday-and-Sunday weekend, Monday January 1 through Sunday January 7, 2024 counts as five business days, two weekend days, and seven total days.
Does it account for public holidays?
Yes, once you say which days they are: type them into the days-off box, one date per line as YYYY-MM-DD (commas work too), and they come off the working total and are shown as their own count. No holiday list is built in on purpose — public holidays differ by country, by region and by year, several of them move with the lunar calendar, and a built-in list that is quietly out of date would be worse than none, because nobody checks it.
What date is 30 business days from today?
The second section answers exactly that: give it a start date and a number of business days and it returns the date and the weekday it falls on. The start date itself is not counted, so one working day from a Friday is the following Monday. A negative number walks backwards, which answers the other half — what date was ten working days ago. Your weekend rule and your days off apply here too.
Are my dates sent to a server?
No. The dates you enter never leave your device. The business-day and weekend counts are computed entirely in your browser with JavaScript — nothing is uploaded, logged, or stored.