Two lines of HTML add a working calculator to any page you have written. It is free, needs no account and no key, and the only condition is that the credit line stays with it.
An embedded calculator is the tool and nothing else: the inputs, the result, the supporting figures, the full payment schedule and the credit line. There is no site navigation, no footer, no article text and no consent banner, because the frame is meant to sit inside a page you have already written.
What follows is the real embed running inside this page, not a screenshot. Change an input and watch it recalculate — the arithmetic happens in your browser, exactly as it will in your reader's.
That frame is https://figuredeck.com/embed/mortgage/payment-calculator/ — the same calculator as the full page at /us/mortgage/payment-calculator/, with the commentary left out.
Two lines go wherever the calculator should appear. The first line is the tool. The second line is the credit, and it sits outside the frame so that it belongs to your page rather than to ours — which is also why a frame that failed to load would still show the credit.
<iframe src="https://figuredeck.com/embed/mortgage/payment-calculator/" title="Mortgage Payment Calculator" width="100%" height="1340" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/payment-calculator/">FigureDeck</a> — free, no sign-up.</p>Swap the two URLs for the calculator you want; every one of them is listed at the bottom of this page. The height on the frame is measured per calculator so that the whole thing fits in a column around 760 pixels wide.
Embedding is free and needs no account, no key and no approval. FigureDeck asks one thing in return: the credit line stays with the calculator.
The credit line is the whole business model for the embed. A link from a page that has real readers is worth more to this site than a licence fee would be, and it costs a host nothing but a line of text. That is the trade, stated plainly, and it is the reason the credit is the one thing we insist on.
The embedded tool loads no analytics tag, no consent banner and no advertising code. Everything it loads comes from figuredeck.com: a stylesheet and the calculator code, and nothing else.
Because the frame runs on your page rather than ours, we do not measure it. We cannot tell you how many people used the calculator you embedded — that count belongs in your own analytics, and you will find it there.
The arithmetic runs in the reader's browser. Nothing typed into the tool is transmitted anywhere, and the embed writes no cookie of ours.
Each calculator states its formula, ships with worked examples that were checked against an independent second implementation of the same mathematics, and records the primary source and the retrieval date behind every external figure.
The embedded version runs the same kernel as the full page and returns the same outputs for the same inputs. If the two ever disagree, that is a defect rather than a difference of opinion — send the calculator and the inputs to the address on the contact page and it will be recorded on the corrections page.
Every calculator on the site can be embedded. The 21 snippets below are complete and ready to paste, and each carries the height measured for that calculator.
<iframe src="https://figuredeck.com/embed/investing/compound-interest-calculator/" title="Compound Interest Calculator" width="100%" height="1160" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/investing/compound-interest-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/investing/retirement-savings-calculator/" title="Retirement Savings Calculator" width="100%" height="1100" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/investing/retirement-savings-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/investing/cagr-calculator/" title="CAGR Calculator" width="100%" height="940" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/investing/cagr-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/investing/inflation-calculator/" title="Inflation and Purchasing Power Calculator" width="100%" height="1540" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/investing/inflation-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/investing/401k-match-calculator/" title="401(k) Employer Match Calculator" width="100%" height="1520" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/investing/401k-match-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/loans/auto-loan-calculator/" title="Auto Loan Calculator" width="100%" height="1140" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/loans/auto-loan-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/loans/credit-card-payoff-calculator/" title="Credit Card Payoff Calculator" width="100%" height="1160" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/loans/credit-card-payoff-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/payment-calculator/" title="Mortgage Payment Calculator" width="100%" height="1340" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/payment-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/extra-payment-calculator/" title="Extra Payment Calculator" width="100%" height="1100" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/extra-payment-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/refinance-break-even-calculator/" title="Refinance Break-Even Calculator" width="100%" height="1540" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/refinance-break-even-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/affordability-calculator/" title="How Much House Can I Afford?" width="100%" height="1000" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/affordability-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/biweekly-payment-calculator/" title="Biweekly Mortgage Payment Calculator" width="100%" height="1680" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/biweekly-payment-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/points-break-even-calculator/" title="Mortgage Points Break-Even Calculator" width="100%" height="1680" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/points-break-even-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/15-vs-30-year-calculator/" title="15-Year vs 30-Year Mortgage Calculator" width="100%" height="1260" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/15-vs-30-year-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/pmi-removal-calculator/" title="PMI Removal Date Calculator" width="100%" height="2520" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/pmi-removal-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/recast-calculator/" title="Mortgage Recast Calculator" width="100%" height="1740" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/recast-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/down-payment-calculator/" title="Down Payment Calculator" width="100%" height="2260" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/down-payment-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/fha-vs-conventional-calculator/" title="FHA vs Conventional Loan Calculator" width="100%" height="2620" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/fha-vs-conventional-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/mortgage/closing-cost-calculator/" title="Closing Cost Calculator" width="100%" height="2620" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/mortgage/closing-cost-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/savings/high-yield-savings-calculator/" title="Savings & APY Calculator" width="100%" height="1120" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/savings/high-yield-savings-calculator/">FigureDeck</a> — free, no sign-up.</p><iframe src="https://figuredeck.com/embed/savings/goal-savings-calculator/" title="Goal Savings Calculator" width="100%" height="1600" style="border:1px solid #d7dce3;border-radius:12px;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.5 -apple-system,BlinkMacSystemFont,sans-serif">Calculator by <a href="https://figuredeck.com/us/savings/goal-savings-calculator/">FigureDeck</a> — free, no sign-up.</p>Send the page URL and what you saw to the address on the contact page. Corrections are recorded publicly, and a misbehaving embed is worth fixing quickly: it is running on someone else's page, where we cannot see it.
FigureDeck is an independent reference tool. The calculators are free, there is no account, and nothing on this site is financial advice. The methodology page sets out how the figures are checked and the about page says what the site does not do.