Free Business Day Calculator Widgets for Your Website
Add a free business day calculator to your website or blog in 30 seconds. Pick a calculator, choose a theme and width, copy the iframe snippet, and paste it into any HTML page, CMS, or documentation tool. The widget stays free and accurate forever.
For site owners and bloggers
If you run an accounting blog, a project-management resource site, or any page that explains deadlines and payment terms, an interactive calculator beats a static example. Pick a tool above, copy the snippet, and paste it in. That is the whole setup.
Publishers: see what is covered, copy-paste descriptions, and brand assets →The publisher hub covers the full calculator and country coverage, ready-to-use blurbs for tool roundups, downloadable brand assets, and how the credit link works.
Free, no account
Embed any calculator with one snippet. No sign-up, no API key, no rate limits.
Accurate and maintained
We carry the public holiday data forward each year, so your embed stays correct without any work on your side.
Mobile-friendly and themed
The widget works on phones and tablets, and you can match a light or dark page with one setting.
Stable URLs
The embed loads from the same domain as our calculators. If the main site is up, your embed works.
About the credit link
The snippet includes a small visible attribution line under the widget that links back to the matching calculator on BusinessDayCalculator.org. It is part of using the free embed, and it is how we fund keeping the tools accurate and online. The link is tasteful and unobtrusive, and you can see exactly what it looks like in the live preview above before you copy anything.