Free publisher tools · No ads or analytics
Add one relevant, maintained calculator beside content that already helps a reader make a decision. Compare all 20 widgets, preview the exact experience and copy the ready-made HTTPS code from its full tool page.
Choose by reader task
Use the calculator that directly supports the surrounding page. Each preview is deliberately excluded from search results; its complete tool page remains the canonical source.
Four-step integration
No UtilHub account or API key is needed. Use the exact snippet on the chosen full tool page so its title, URL and maintained frame height stay together.
Choose one calculator that completes an action already introduced by the surrounding article. Avoid placing unrelated widgets merely to fill a page.
Paste the iframe and the visible “Powered by UtilHub UK” line. Keep the supplied title, lazy loading, referrer policy and nofollow attribution.
Use an HTTPS page, retain width="100%" and the documented height, and let the iframe shrink to its container rather than forcing a fixed width.
Check keyboard use, focus visibility, mobile width and the full calculation flow. Give the widget a nearby heading that explains why it is relevant.
Representative snippet
This profit-margin example shows the structure. Choose “Get exact code” above for the correct URL, accessible title and height for another calculator.
<iframe src="https://utilhub.co.uk/embed/profit-margin-calculator/" title="UtilHub UK profit margin and markup calculator" loading="lazy" width="100%" height="1250" style="border:0;max-width:860px" referrerpolicy="strict-origin-when-cross-origin"></iframe>
<p><a href="https://utilhub.co.uk/tools/profit-margin-calculator/" rel="nofollow noopener">Powered by UtilHub UK</a></p>Privacy, performance and SEO
The widget is a hosted UtilHub page, not a script copied into your codebase. These boundaries apply to every listed calculator.
Public calculator inputs and results are processed on the device. UtilHub does not receive those entered values. A run makes a small allowance check containing the tool identifier and access context—not the calculation fields or result.
A guest receives 3 public-tool runs per rolling 24 hours and a verified free account receives 10. Premium removes that limit for normal interactive use. The frame does not bypass site controls.
The iframe loads UtilHub’s shared interface assets and uses lazy loading. It carries no advertising or analytics script. Add only the widget a page needs to avoid unnecessary network and layout cost.
Embed previews are noindex, canonicalise to the complete tool and use visible nofollow attribution. A relevant calculator may help readers, but UtilHub does not claim that it improves rankings or creates an earned backlink.
UtilHub’s framing policy allows secure HTTPS origins. Do not proxy, alter or conceal the hosted page, bypass allowances, remove the attribution or present the calculator as an endorsement.
Corrections and interface updates are published on UtilHub. If the documented height changes materially, it will appear in the exact snippet and the release log.
Publisher questions
Yes, on a relevant public HTTPS page. Keep the supplied visible attribution and normal quota controls. No account or API key is required to publish the frame.
The public embed is a maintained hosted experience and is not white-labelled or configurable. The listed business tool services cover separately scoped hosted workflows.
No. Entered calculator values and results remain in the browser. The allowance request identifies the tool and access tier but does not include the calculation data.
Usually not. One directly relevant, lazy-loaded calculator is clearer and lighter. Link readers to this catalogue if they need a different task.
Ready to add one?
Preview the complete interaction, then copy the maintained snippet from that calculator’s full page. For editorial, accessibility or integration questions, use the published support form.