Free Calculator Widgets for Your Website
Put a working EMI, SIP, income tax or GST calculator inside your blog post. Free, no signup, no ads inside the widget. It fits any width from phones to a full article column.
How to add a widget
- Copy the embed code under the calculator you want.
- WordPress: add a Custom HTML block where you want the calculator and paste the code.
- Blogger: open the post, switch from Compose view to HTML view, and paste the code where you want it.
- Other sites: paste it anywhere your editor accepts HTML.
The second, optional script makes the widget grow and shrink to fit its content. If your site removes scripts, leave it out — the widget still works at a fixed height. For a dark version, add ?theme=dark to the iframe address.
EMI Calculator
Monthly EMI, total interest and total payable for home, car, personal and education loans. Open the full tool
Embed code
<iframe src="https://cubestack.in/embed/emi-calculator" title="EMI Calculator by Cubestack" loading="lazy" style="width:100%;max-width:700px;border:0;display:block" height="960"></iframe>
<p style="font-size:12px">EMI Calculator by <a href="https://cubestack.in/tools/emi-calculator">Cubestack</a></p>Optional: auto-fit height (if your site allows scripts)
<script>
(function(){if(window.__cubestackEmbed)return;window.__cubestackEmbed=1;
window.addEventListener("message",function(e){var d=e.data;
if(e.origin!=="https://cubestack.in"||!d||d.type!=="cubestack-embed-height"||typeof d.slug!=="string"||typeof d.height!=="number")return;
var f=document.getElementsByTagName("iframe");
for(var i=0;i<f.length;i++){if(f[i].contentWindow===e.source&&f[i].src.indexOf("https://cubestack.in/embed/"+d.slug)===0){f[i].style.height=Math.min(4000,Math.max(200,Math.ceil(d.height)))+"px";}}});
var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++){if(f[i].src.indexOf("https://cubestack.in/embed/")===0&&f[i].contentWindow)f[i].contentWindow.postMessage({type:"cubestack-embed-ping"},"https://cubestack.in");}})();
</script>SIP Calculator
What a monthly SIP or a one-time lump sum can grow to, with an optional yearly step-up. Open the full tool
Embed code
<iframe src="https://cubestack.in/embed/sip-calculator" title="SIP Calculator by Cubestack" loading="lazy" style="width:100%;max-width:700px;border:0;display:block" height="860"></iframe>
<p style="font-size:12px">SIP Calculator by <a href="https://cubestack.in/tools/sip-calculator">Cubestack</a></p>Optional: auto-fit height (if your site allows scripts)
<script>
(function(){if(window.__cubestackEmbed)return;window.__cubestackEmbed=1;
window.addEventListener("message",function(e){var d=e.data;
if(e.origin!=="https://cubestack.in"||!d||d.type!=="cubestack-embed-height"||typeof d.slug!=="string"||typeof d.height!=="number")return;
var f=document.getElementsByTagName("iframe");
for(var i=0;i<f.length;i++){if(f[i].contentWindow===e.source&&f[i].src.indexOf("https://cubestack.in/embed/"+d.slug)===0){f[i].style.height=Math.min(4000,Math.max(200,Math.ceil(d.height)))+"px";}}});
var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++){if(f[i].src.indexOf("https://cubestack.in/embed/")===0&&f[i].contentWindow)f[i].contentWindow.postMessage({type:"cubestack-embed-ping"},"https://cubestack.in");}})();
</script>Income Tax Calculator
New vs old regime for FY 2026-27, with deductions, rebate, surcharge and cess. Open the full tool
Embed code
<iframe src="https://cubestack.in/embed/income-tax-calculator" title="Income Tax Calculator by Cubestack" loading="lazy" style="width:100%;max-width:700px;border:0;display:block" height="1550"></iframe>
<p style="font-size:12px">Income Tax Calculator by <a href="https://cubestack.in/tools/income-tax-calculator">Cubestack</a></p>Optional: auto-fit height (if your site allows scripts)
<script>
(function(){if(window.__cubestackEmbed)return;window.__cubestackEmbed=1;
window.addEventListener("message",function(e){var d=e.data;
if(e.origin!=="https://cubestack.in"||!d||d.type!=="cubestack-embed-height"||typeof d.slug!=="string"||typeof d.height!=="number")return;
var f=document.getElementsByTagName("iframe");
for(var i=0;i<f.length;i++){if(f[i].contentWindow===e.source&&f[i].src.indexOf("https://cubestack.in/embed/"+d.slug)===0){f[i].style.height=Math.min(4000,Math.max(200,Math.ceil(d.height)))+"px";}}});
var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++){if(f[i].src.indexOf("https://cubestack.in/embed/")===0&&f[i].contentWindow)f[i].contentWindow.postMessage({type:"cubestack-embed-ping"},"https://cubestack.in");}})();
</script>GST Calculator
Add or remove GST at any rate and split it into CGST + SGST or IGST. Open the full tool
Embed code
<iframe src="https://cubestack.in/embed/gst-calculator" title="GST Calculator by Cubestack" loading="lazy" style="width:100%;max-width:700px;border:0;display:block" height="780"></iframe>
<p style="font-size:12px">GST Calculator by <a href="https://cubestack.in/tools/gst-calculator">Cubestack</a></p>Optional: auto-fit height (if your site allows scripts)
<script>
(function(){if(window.__cubestackEmbed)return;window.__cubestackEmbed=1;
window.addEventListener("message",function(e){var d=e.data;
if(e.origin!=="https://cubestack.in"||!d||d.type!=="cubestack-embed-height"||typeof d.slug!=="string"||typeof d.height!=="number")return;
var f=document.getElementsByTagName("iframe");
for(var i=0;i<f.length;i++){if(f[i].contentWindow===e.source&&f[i].src.indexOf("https://cubestack.in/embed/"+d.slug)===0){f[i].style.height=Math.min(4000,Math.max(200,Math.ceil(d.height)))+"px";}}});
var f=document.getElementsByTagName("iframe");for(var i=0;i<f.length;i++){if(f[i].src.indexOf("https://cubestack.in/embed/")===0&&f[i].contentWindow)f[i].contentWindow.postMessage({type:"cubestack-embed-ping"},"https://cubestack.in");}})();
</script>