Business Days Calculator

Working days between two dates, holidays excluded properly.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

From

Public holidays to exclude

Optional. Dates as yyyy-mm-dd, comma separated. One falling on a weekend is not counted twice.

Working days

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Enter two valid dates.

How the Business Days Calculator works

Enter two dates for the number of working days between them, with weekends removed and any public holidays you supply taken out as well. A holiday landing on a weekend is not subtracted twice, which is how this calculation usually comes out one day short.

Also known as: working days between two dates · weekdays between dates calculator · how many working days calculator · business days excluding holidays

Where to go next

The Business Days question rarely arrives on its own. These are the ones that usually come with it:

Date Difference Calculator — Days between two dates, with or without weekends.
Date Add and Subtract Calculator — What date is 90 days from now — with month-end handled.
Day of the Week Calculator — What day any date falls on, past or future.
Percentage Calculator — Every common percentage question in one place.

Sources

NIST, Time and frequency division

Frequently asked questions

How do I calculate business days between two dates?

Count the total days, remove Saturdays and Sundays, then remove any public holidays that fall on a weekday. Holidays already on a weekend must not be removed again. They were excluded once already.

Does this include the start and end dates?

It counts the interval rather than both endpoints, so Monday to Friday is four working days. If you need the inclusive count — five — add one. Contracts differ on which they mean, so it is worth checking the wording.

Which days count as the weekend?

Saturday and Sunday here. That is not universal: much of the Middle East works Sunday to Thursday, and some countries have a single rest day. Check the convention before applying this to an agreement.

Why do I need to enter holidays myself?

Because public holidays vary by country, region and year, and a built-in list would silently go stale. An outdated holiday list is worse than none, since it produces a confident wrong answer.

Put this calculator on your own site

Free to use, on any site, commercial or not. Paste this where you want it to appear. It is a plain iframe, so it works in WordPress, Squarespace, Wix, Webflow, Ghost and anything else that accepts HTML.

The one-line version

<iframe src="https://www.thecalclibrary.com/embed/business-days-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px" loading="lazy" title="Business Days Calculator"></iframe>
<p style="font:13px/1.5 system-ui,sans-serif;margin:6px 0 0;color:#64748b">Powered by <a href="https://www.thecalclibrary.com/business-days-calculator" style="color:#64748b">Business Days Calculator</a> from The Calc Library</p>

The only condition is that the credit line below the frame stays in place. That one line is what pays for the tool being free — it is how anyone else finds it.