Embed Interactive Content on HubSpot CMS
Embed a calculator on your HubSpot CMS pages. Leads sync directly to HubSpot CRM with full calculator data attached.
CalcStack tools are embedded on HubSpot CMS websites across every major industry. The embed process takes under 60 seconds, paste one line of code and your interactive tool is live, branded to your website, capturing qualified leads. Read the full embed guide or see pricing.
Live demo
See a Live Example
This is a real CalcStack tool. Your visitors see this exact experience.
Why CalcStack
Why CalcStack for HubSpot CMS?
Native HubSpot CRM sync
Leads captured by your calculator are pushed directly to HubSpot CRM as contacts. No Zapier or middleware required, CalcStack offers a first-party HubSpot integration that maps calculator fields to contact properties automatically.
Lead capture with full context
Every lead includes the inputs they entered, the results they received, the page they were on, and a lead quality score. Your sales team gets qualification data, not just a name and email, so they can prioritize follow-up based on buying intent.
Industry benchmarks
Show visitors how they compare to industry averages. Benchmarks increase engagement, keep visitors on your page longer, and drive more leads through the funnel by creating a compelling reason to share their contact details.
Works with any HubSpot template
The embed code works inside any HubSpot CMS template, drag-and-drop pages, landing pages, blog posts, and custom HubL layouts. Professional and Enterprise tiers support custom modules for even deeper integration.
How the HubSpot CMS Embed Works
HubSpot CMS lead generation through CalcStack works via a single Rich Text or Custom HTML module. Visitors interact with calculators, scorecards, or quizzes; their inputs flow directly into HubSpot contacts as custom properties with no middleware. Each lead arrives with full context (inputs, outputs, score, recommendations) alongside existing HubSpot CRM data.
The embed loads inside an isolated iframe. Your HubSpot CMS template, modules, and page speed remain completely unaffected. The calculator communicates lead data back to CalcStack via a secure postMessage bridge, and CalcStack pushes it to HubSpot CRM in real time.
Because HubSpot CMS and HubSpot CRM share a single platform, CalcStack can enrich contact records with calculator data the moment a lead is captured, no sync delay, no middleware, no lost data between systems. According to HubSpot's State of Marketing Report, marketing teams using interactive content alongside their CRM see significantly higher lead-to-customer conversion rates than those relying on static landing pages alone.
Embed Code Reference
Two approaches: use the Custom HTML module in the drag-and-drop page editor (no code), or create a reusable HubL module for developers who manage templates programmatically. Both support lead capture and CRM integration.
Custom HTML Module (Drag-and-Drop Editor)
In the HubSpot page editor, click Add in the left sidebar, search for "Custom HTML", and drag the module into your page layout. Paste one of the following embed codes into the module body.
Custom HTML module embed
<iframe src="https://calcstack.net/embed/profit-margin-calculator?customer=your-id" width="100%" height="600" frameborder="0"></iframe>Script embed with auto-resize
<div data-calcstack-tool="profit-margin-calculator" data-customer="your-id"></div>
<script src="https://calcstack.net/embed.js"></script>HubL Module (For Developers)
Developers who manage HubSpot templates via the Design Manager or CLI can create a reusable CalcStack module in HubL. This approach lets you parameterize the tool slug and customer ID so content editors can configure calculators without touching code.
HubL module example
{# CalcStack embed as a custom HubL module #}
{% module "calcstack_embed" path="/CalcStack Embed",
tool="profit-margin-calculator",
customer_id="your-id",
height="600"
%}
{# Or use raw HTML in a HubL template #}
{% raw %}
<iframe
src="https://calcstack.net/embed/profit-margin-calculator?customer=your-id"
width="100%"
height="600"
frameborder="0"
loading="lazy"
></iframe>
{% endraw %}HubSpot's built-in analytics complement CalcStack lead capture. You can see page views and traffic sources in HubSpot while CalcStack tracks calculator interactions, completion rates, and lead quality scores in your CalcStack dashboard.
Common Issues & Troubleshooting
Most HubSpot CMS embed issues are resolved in under a minute. Here are the three most common problems and their fixes.
Custom HTML module not available in starter templates
Cause: HubSpot Starter CMS templates have a limited set of modules. The Custom HTML module is not included in all starter-tier page templates.
Fix: Upgrade to HubSpot CMS Professional or Enterprise, which unlock all module types. Alternatively, use a page template with flexible columns that support custom modules, some starter templates include a "flexible column" area where Custom HTML is available. Check HubSpot's template marketplace for compatible layouts.
HubSpot preview sandbox blocks iframe content
Cause: HubSpot's in-editor preview sandbox restricts external iframes for security. The calculator may appear blank or show a placeholder in the drag-and-drop editor preview.
Fix: Publish the page to a staging environment or go live to see the embed render correctly. The sandbox restricts external iframes as a security measure, this is expected behavior. Use HubSpot's "Preview" button (which opens a new tab) rather than the in-editor preview to verify the embed before publishing.
Leads appear in CalcStack but not in HubSpot CRM
Cause: The CalcStack-to-HubSpot integration has not been configured. CalcStack captures leads immediately, but CRM sync requires an active connection.
Fix: Set up the webhook integration from CalcStack to HubSpot via the native HubSpot integration in your CalcStack dashboard, or connect through Zapier. Once configured, leads flow automatically: CalcStack captures the lead, pushes it to HubSpot, and a new contact record is created with all calculator data attached. Check your integration settings to verify the connection is active.
Popular Lead Generation Tools for HubSpot Sites
These are the most-embedded tools on HubSpot CMS sites. Each one captures qualified leads with industry-specific data. Browse all tools on the resources page.
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Pipeline Value Calculator
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Turn Your HubSpot CMS Visitors Into Qualified Leads
Start with the Free plan, no credit card required. Embed interactive tools and start capturing leads today.