Embed a free calculator on your site

Six calculators, one snippet of HTML. No signup, no tracking scripts, no ads inside the widget. Attribution links back to ConvertHub.

HTML

<iframe id="ch-mortgage-calculator" src="https://converthubapp.online/embed/mortgage-calculator" width="100%" height="560" style="border:0;max-width:640px" loading="lazy" title="Mortgage Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/mortgage-calculator?utm_source=embed&utm_medium=widget&utm_campaign=mortgage-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-mortgage-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='mortgage-calculator')return;f.style.height=e.data.height+'px';});})();</script>

HTML

<iframe id="ch-loan-calculator" src="https://converthubapp.online/embed/loan-calculator" width="100%" height="440" style="border:0;max-width:640px" loading="lazy" title="Loan Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/loan-calculator?utm_source=embed&utm_medium=widget&utm_campaign=loan-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-loan-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='loan-calculator')return;f.style.height=e.data.height+'px';});})();</script>

HTML

<iframe id="ch-compound-interest-calculator" src="https://converthubapp.online/embed/compound-interest-calculator" width="100%" height="500" style="border:0;max-width:640px" loading="lazy" title="Compound Interest Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/compound-interest-calculator?utm_source=embed&utm_medium=widget&utm_campaign=compound-interest-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-compound-interest-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='compound-interest-calculator')return;f.style.height=e.data.height+'px';});})();</script>

HTML

<iframe id="ch-savings-goal-calculator" src="https://converthubapp.online/embed/savings-goal-calculator" width="100%" height="440" style="border:0;max-width:640px" loading="lazy" title="Savings Goal Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/savings-goal-calculator?utm_source=embed&utm_medium=widget&utm_campaign=savings-goal-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-savings-goal-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='savings-goal-calculator')return;f.style.height=e.data.height+'px';});})();</script>

HTML

<iframe id="ch-bmi-calculator" src="https://converthubapp.online/embed/bmi-calculator" width="100%" height="380" style="border:0;max-width:640px" loading="lazy" title="BMI Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/bmi-calculator?utm_source=embed&utm_medium=widget&utm_campaign=bmi-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-bmi-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='bmi-calculator')return;f.style.height=e.data.height+'px';});})();</script>

HTML

<iframe id="ch-calorie-calculator" src="https://converthubapp.online/embed/calorie-calculator" width="100%" height="520" style="border:0;max-width:640px" loading="lazy" title="Calorie Calculator — ConvertHub"></iframe>
<p style="font-family:system-ui,-apple-system,sans-serif;font-size:12px;margin:8px 0 0"><a href="https://converthubapp.online/calorie-calculator?utm_source=embed&utm_medium=widget&utm_campaign=calorie-calculator" target="_blank" rel="noopener">Calculator by ConvertHub</a></p>
<script>(function(){var f=document.getElementById('ch-calorie-calculator');addEventListener('message',function(e){if(e.origin!=='https://converthubapp.online'||!e.data||e.data.type!=='ch-embed-height'||e.data.slug!=='calorie-calculator')return;f.style.height=e.data.height+'px';});})();</script>

Who it is for

Personal finance blogs, mortgage brokers, real estate agents, HR and payroll sites, gyms, nutritionists and teachers. If your readers need a number — a monthly payment, a BMI, a savings target — the widget answers it without sending them away.

The rules

Free for commercial and non-commercial sites. Keep the attribution link visible. Do not wrap the iframe in a way that hides it. No ads are served inside the embed; the full page carries the advertising. If you need a custom size, colour or a calculator that is not listed, write to hello@converthubapp.online.

Why the code includes a script

The iframe cannot resize itself across domains. The small script listens for the height message from the widget and adjusts the frame, so there are no inner scrollbars. The iframe works on its own too; the script only improves the fit.