Free GST Calculator Widget
Add a clean, mobile-friendly GST calculator to your website in seconds. Great for accountants, business blogs, and finance sites. Free forever, no signup, no tracking of your visitors.
Live preview
Copy the embed code
<iframe src="https://gstinvoicepdf.com/embed/gst-calculator"
width="100%" height="440" style="border:0;max-width:400px;border-radius:16px"
title="Free GST Calculator" loading="lazy"></iframe>
<p style="font:13px/1.5 sans-serif;color:#64748b">Free
<a href="https://gstinvoicepdf.com/gst-calculator" target="_blank" rel="noopener">GST Calculator</a>
by <a href="https://gstinvoicepdf.com" target="_blank" rel="noopener">GSTInvoicePDF.com</a></p>Paste it anywhere in your page’s HTML — WordPress (Custom HTML block), Webflow, Ghost, Blogger, or any site builder that accepts embed code. Keep the small credit link so your visitors know where the tool comes from.
Lightweight & fast
A single iframe. No heavy scripts on your page, and it loads lazily so it never slows you down.
Private by design
All calculations happen in the browser. Nothing your visitors type is stored or sent anywhere.
Works everywhere
Responsive down to mobile and compatible with every major CMS and website builder.
How to add the GST calculator to your website
- Copy the embed code above.
- Open the page or post where you want the calculator to appear.
- Add a “Custom HTML” / “Embed” block and paste the code.
- Publish. The calculator appears instantly and works on desktop and mobile.
Frequently asked questions
Is the widget really free? Yes — free to embed on any number of pages, with no signup.
Can I resize it? Yes. Adjust the height and max-width values in the embed code to fit your layout.
Does it need maintenance? No. It always serves the latest version from GSTInvoicePDF.com automatically.
Need to create invoices too?
Beyond the calculator, generate full GST-compliant invoices and download professional PDFs — free.
Try the Free GST Invoice Generator