Calculators on Webflow,
in five steps
Add an Embed element, paste your snippet, publish, and test. This guide covers the clicks, the common snags and how to confirm leads arrive.
How do I add a calculator to Webflow?
Add an Embed element on the page, paste the snippet from your calculator's Embed tab, and publish. The calculator loads from our servers, stays style-isolated from your theme, and works on mobile. No plugin is required.
Embedding on Webflow
Open the Designer
Open the page in Webflow Designer.
Add an Embed element
From the Add panel, drag a Code Embed element into place.
Paste the snippet
Paste it into the code editor and save.
Publish the site
Custom code runs on the published site, not always in the Designer.
Test
Run the calculator on the published URL.
The snippet you'll paste
Copy the real one from the app; it contains your embed key.
<div data-calculator="rmd" data-key="YOUR_EMBED_KEY" data-mode="inline"></div>
<script src="https://app.numbersforclients.com/cf.js" async></script>Illustrative example. The loader script needs to appear only once per page.
Common problems and fixes
| Problem | Fix |
|---|---|
| 'Custom code requires a paid plan' | Custom code embeds need a paid site or workspace plan. |
| Calculator hidden in Designer | Expected; check the published site. |
| Layout collapses | Give the parent div a width, for example 100%. |
Webflow runs custom code on published sites. If you use CMS templates, you can add the embed to a template with a field for the calculator name.
Webflow embedding questions
Do I need a plugin or app for Webflow?
No. The snippet is plain HTML and JavaScript, so any block or element that accepts custom code works.
Where do I get my snippet?
In the app, open the calculator, go to the Embed tab and copy the snippet for the display mode you want.
Can I add several calculators to one page?
Yes. Paste each calculator's placeholder; the loader script only needs to appear once per page. Or use a widget.
The calculator doesn't appear. What should I check?
Confirm the code block allows JavaScript, that you published (not just saved) the page, and that the calculator is active in your account. Then try the framed mode.
Will the calculator use my site's fonts?
No, it's style-isolated. Set fonts and colors in the app so it matches.
Does the calculator work on mobile?
Yes, it's responsive. Preview the page on a phone before announcing it.
How do I test lead capture?
Submit the form with your own details and check that the contact appears in the app and the email arrives.
Can I put the calculator in a popup instead?
Yes, copy the popup button or floating snippet from the Embed tab.
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