Free Embeddable Widgets

Add Calculators to Any Website

65+ free, mobile-friendly calculators — embed with one line of code. No API key, no sign-up, works on any website or blog.

Mobile responsive Desktop ready 1-line embed Always free

Choose a Calculator

Preview: Loan / EMI

calcsvault.com/widget/loan-emi

Simple Embed

<iframe
  src="https://calcsvault.com/widget/loan-emi?theme=dark"
  width="100%"
  height="520"
  style="border:none; border-radius:16px; overflow:hidden;"
  title="Loan / EMI — CalcsVault"
  loading="lazy"
  allow="clipboard-write"
></iframe>

Auto-resize EmbedRecommended

<!-- Auto-resize script (optional — makes iframe height dynamic) -->
<iframe
  id="cv-widget-loan-emi"
  src="https://calcsvault.com/widget/loan-emi?theme=dark"
  width="100%"
  height="520"
  style="border:none; border-radius:16px; overflow:hidden;"
  title="Loan / EMI — CalcsVault"
  loading="lazy"
></iframe>
<script>
window.addEventListener("message", function(e) {
  if (e.data && e.data.type === "calcsvault-resize") {
    var f = document.getElementById("cv-widget-loan-emi");
    if (f) f.height = e.data.height + 32;
  }
});
</script>

How to Embed

Pick a Calculator

Choose from 65+ free calculators — finance, Islamic, health, education, forex and more.

Copy the Code

Select Dark or Light theme, then copy the embed code — one simple iframe tag.

Paste Anywhere

Paste into any website, WordPress, Blogger, Webflow, Notion, or any HTML page.

Common Questions

Is it really free to embed?

Yes, 100% free. All CalcsVault calculators can be embedded on any website at no cost. No API key, no account required.

Will it work on mobile?

Yes. Every widget is fully responsive — it adapts to any screen size from 320px mobile to widescreen desktop.

Can I change the theme?

Add ?theme=light or ?theme=dark to the URL. The default auto mode follows the visitor's OS preference.

What if the calculator height changes?

Use the Auto-resize embed code — it listens for height messages from the widget and adjusts the iframe automatically.

Can I remove the CalcsVault branding?

The 'Powered by CalcsVault' footer is part of our free tier. We may offer a white-label option in the future.

Need a specific calculator?

Browse all 65+ calculators or visit the full site.

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