Embed our calculators on your site

Real estate bloggers, agents, course creators, and finance writers: grab the iframe code below and drop any of our 14 free calculators on your site. Free to use forever. No signup, no attribution required beyond the small "Powered by TrueCap" footer (which links back to us — so you get a free calculator, we get a backlink).

14 calculators

Cap rate, CoC, DSCR, BRRRR, more

Auto-resizing

No nested scrollbars on your page

Mobile-friendly

Responsive on every screen size

Free forever

No API key, no signup, no rate limits

How to embed

Pick the calculator below that fits your post or page.
Click "Copy" on the embed code.
Paste the HTML into your page. Works on WordPress (Custom HTML block), Webflow (Embed element), Ghost (HTML card), Squarespace (Code block), Substack, and any CMS that accepts raw HTML.
Save. The calculator renders on your page with auto-sized height.

Want a calculator we don't have here? Send us a note — we'll consider adding it.

Pick a calculator

13 available

Cap Rate Calculator

Preview

Capitalization rate from price, rent, and operating expenses.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/cap-rate-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:680px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="cap-rate-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/cap-rate-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(680,d.height)+"px";
  });
})();
</script>

Cash-on-Cash Return Calculator

Preview

Return on actual cash invested in a rental.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/cash-on-cash-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:760px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="cash-on-cash-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/cash-on-cash-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(760,d.height)+"px";
  });
})();
</script>

DSCR Calculator

Preview

Debt Service Coverage Ratio — the metric every commercial and investment-property lender uses.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/dscr-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:700px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="dscr-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/dscr-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(700,d.height)+"px";
  });
})();
</script>

NOI Calculator

Preview

Net Operating Income with every common operating expense category.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/noi-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:820px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="noi-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/noi-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(820,d.height)+"px";
  });
})();
</script>

Mortgage Payment Calculator

Preview

PITI breakdown — principal, interest, taxes, insurance — for investment property loans.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/mortgage-payment-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:700px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="mortgage-payment-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/mortgage-payment-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(700,d.height)+"px";
  });
})();
</script>

Gross Rent Multiplier (GRM) Calculator

Preview

The 10-second screening ratio for triaging rental deals.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/gross-rent-multiplier-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:560px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="gross-rent-multiplier-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/gross-rent-multiplier-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(560,d.height)+"px";
  });
})();
</script>

1% Rule Calculator

Preview

Pass/fail rental property screening filter in 5 seconds.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/1-percent-rule-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:480px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="1-percent-rule-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/1-percent-rule-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(480,d.height)+"px";
  });
})();
</script>

BRRRR Calculator

Preview

Buy, Rehab, Rent, Refinance — model the full strategy in one view.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/brrrr-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:880px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="brrrr-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/brrrr-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(880,d.height)+"px";
  });
})();
</script>

Break-Even Calculator

Preview

Months until rental cash flow returns initial investment.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/break-even-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:640px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="break-even-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/break-even-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(640,d.height)+"px";
  });
})();
</script>

ROI Calculator

Preview

Total return — cash flow + principal paydown + appreciation in one composite number.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/roi-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:760px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="roi-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/roi-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(760,d.height)+"px";
  });
})();
</script>

Closing Cost Calculator

Preview

Line-item closing costs on a rental purchase — origination, title, transfer tax, escrow, prepaids.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/closing-cost-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:880px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="closing-cost-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/closing-cost-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(880,d.height)+"px";
  });
})();
</script>

Vacancy Rate Calculator

Preview

Effective vacancy rate from vacant days + turnover cost. Honest underwriting math.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/vacancy-rate-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:700px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="vacancy-rate-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/vacancy-rate-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(700,d.height)+"px";
  });
})();
</script>

Rental Property Tax Calculator

Preview

Schedule E income, 27.5-year depreciation, after-tax cash flow.

Embed code (HTML)

<iframe
  src="https://usetruecap.com/embed/rental-property-tax-calculator"
  loading="lazy"
  style="width:100%; max-width:640px; border:0; height:1100px; display:block;"
  title="TrueCap calculator"
></iframe>
<script>
(function(){
  window.addEventListener("message",function(e){
    var d=e.data;
    if(!d||d.type!=="truecap:embed:resize"||d.slug!=="rental-property-tax-calculator")return;
    var f=document.querySelector('iframe[src="https://usetruecap.com/embed/rental-property-tax-calculator"]');
    if(f&&typeof d.height==="number")f.style.height=Math.max(1100,d.height)+"px";
  });
})();
</script>

Questions

Can I customize the calculator's look?

Not in v1 — the calculator inherits TrueCap's styling so it stays consistent across embeds. If there's demand for color/branding customization, we'll add it.

Do I have to keep the 'Powered by TrueCap' footer?

Yes. The footer is the only ask in exchange for free, hosted, maintained calculators. It's small, tasteful, and doesn't compete with your content.

Will the calculator slow down my site?

No. The iframe loads lazily (loading="lazy") so it only fetches when scrolled into view. Renders independently of your page so it can't block your content from showing.

Can I track conversions from my embed?

The attribution link uses utm_source=embed plus a per-calculator utm_campaign so we can report aggregate traffic. If you want per-site attribution, add ?ref=<your-site> to the iframe src — we'll forward it on through to TrueCap and pass it to GA.

What if your calculator math changes?

Embeds auto-update because they load from TrueCap servers. You always get the current version. We commit to backward-compatible URLs — embed code you paste today keeps working forever.

Have a real estate audience?

Embed a calculator + write a 200-word post about it. Your readers get a useful tool. You get an interactive page that ranks for calculator queries. We get a backlink. Everyone wins.

Try the full TrueCap analyzer