Embed our calculators on your website — free

Add any of these calculators to your own site, blog, or client's page with one line of code. They run entirely in the visitor's browser, auto-resize to fit, and never need a signup or API key. Free forever.

How to embed in 3 steps

1. Pick a widget below and click Copy embed code.
2. Paste it into your page's HTML where you want the calculator to appear.
3. That's it — the widget loads instantly and resizes itself. Works on WordPress, Wix, Webflow, Ghost, plain HTML and more.

Loan EMI with full amortization schedule. Open the full tool →

EMI Calculator

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Paste this where you want it on your site

<iframe id="tot-emi-calculator" src="https://topopentools.com/embed/emi-calculator" title="EMI Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:760px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="emi-calculator"){var f=document.getElementById("tot-emi-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Project mutual-fund SIP growth over time. Open the full tool →

SIP Calculator

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Paste this where you want it on your site

<iframe id="tot-sip-calculator" src="https://topopentools.com/embed/sip-calculator" title="SIP Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:640px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="sip-calculator"){var f=document.getElementById("tot-sip-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Monthly mortgage with taxes & insurance. Open the full tool →

Mortgage Calculator

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<iframe id="tot-mortgage-calculator" src="https://topopentools.com/embed/mortgage-calculator" title="Mortgage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:780px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="mortgage-calculator"){var f=document.getElementById("tot-mortgage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Compare trading charges across 5 Indian brokers. Open the full tool →

Brokerage Calculator

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<iframe id="tot-brokerage-calculator" src="https://topopentools.com/embed/brokerage-calculator" title="Brokerage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:840px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="brokerage-calculator"){var f=document.getElementById("tot-brokerage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Body Mass Index with healthy-range category. Open the full tool →

BMI Calculator

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Paste this where you want it on your site

<iframe id="tot-bmi-calculator" src="https://topopentools.com/embed/bmi-calculator" title="BMI Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:560px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="bmi-calculator"){var f=document.getElementById("tot-bmi-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Percent of a number, change, and ratios. Open the full tool →

Percentage Calculator

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Paste this where you want it on your site

<iframe id="tot-percentage-calculator" src="https://topopentools.com/embed/percentage-calculator" title="Percentage Calculator by TopOpenTools" loading="lazy" style="width:100%;max-width:680px;height:480px;border:1px solid #e5e7eb;border-radius:12px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="topopentools:height"&&e.data.slug==="percentage-calculator"){var f=document.getElementById("tot-percentage-calculator");if(f)f.style.height=e.data.height+"px"}});</script>

Free to use. The widget auto-resizes and links back to TopOpenTools.

Terms of use

These widgets are free for personal and commercial websites. Please keep the “Powered by TopOpenTools” link intact. The calculators are for general information only and are not financial, tax, or medical advice. Want a tool added to this list? Let us know.