Business Day Calculator
Count the working days between two dates, or add business days to a date — weekends skipped.
A business day is a weekday — Monday through Friday. To count business days between two dates, include both ends and skip every Saturday and Sunday: Monday to Friday of the same week is 5 business days. You can also add or subtract business days from a date; adding one business day to a Friday lands on the following Monday. Enter your dates to calculate either one.
Results are estimates provided for general information.
Weekends excluded; holidays not counted.
Embed this calculator on your site →
About the Business Day Calculator
Business days — the weekdays from Monday to Friday — are how deadlines, shipping estimates, and payment terms are usually counted, because most offices are closed on weekends. This calculator does the two jobs that come up most. The first counts the working days between two dates: pick a start and an end, and it tallies every weekday from one to the other, counting both endpoints and skipping every Saturday and Sunday. That's the same logic spreadsheets call NETWORKDAYS, so a Monday-to-Friday span is five business days, not seven. The second adds or subtracts a number of business days from a date: enter a start date and a count, and it steps forward (or backward, with a negative number) over weekdays only until it has moved that many working days, landing on the resulting date and telling you which weekday it is. So 'five business days from now' or 'the invoice is due 30 working days after delivery' both become a real calendar date in one step. One limit worth stating plainly: this tool skips weekends but does not know about public holidays, which vary by country and region — if a holiday falls inside your span, subtract it yourself.
Frequently asked questions
What counts as a business day?+
A business day is a weekday: Monday, Tuesday, Wednesday, Thursday, or Friday. Saturdays and Sundays are not business days. This calculator excludes weekends from every count and every date it produces.
How many business days are between two dates?+
Count every weekday from the start date to the end date, including both, and skip the weekends. Monday to Friday of the same week is 5 business days; Friday to the following Monday is 2. Enter your two dates and the calculator does the tally.
How do I add business days to a date?+
Switch to the add/subtract mode, enter a start date and a number of business days, and the calculator steps over weekdays only. Adding one business day to a Friday lands on the following Monday; use a negative number to count backward.
Does this account for public holidays?+
No. The calculator skips weekends but does not include public holidays, which differ by country, state, and year. If a holiday falls within your date range, subtract it from the result to get the true number of working days.
Are the start and end dates both counted?+
Yes. When counting the business days between two dates, both the start and the end date are included if they're weekdays — the same convention spreadsheets use for NETWORKDAYS. That's why a single weekday counted against itself is one business day, not zero.
Embed this calculator
Free to use on your own site. Paste this snippet where you want the business day calculator to appear — it resizes itself automatically.
<iframe
src="https://manytools.co/embed/business-day-calculator"
title="Business Day Calculator by ManyTools"
data-manytools="business-day-calculator"
width="100%"
height="640"
loading="lazy"
style="border:0;width:100%;max-width:720px"></iframe>
<script>
(function () {
window.addEventListener("message", function (e) {
if (e.origin !== "https://manytools.co") return;
var d = e.data || {};
if (d.type !== "manytools:embed:height" || d.slug !== "business-day-calculator") return;
var f = document.querySelector('iframe[data-manytools="business-day-calculator"]');
if (f && d.height) f.style.height = d.height + "px";
});
})();
</script><a href="https://manytools.co/datetime/business-day-calculator">Business Day Calculator by ManyTools</a>