Embed the mortgage payoff calculator

How much sooner a mortgage ends with extra monthly payments or a one-off payment, with the interest on each schedule and the extra paid. Free to use on any site, with one line of HTML and nothing to sign up for.

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This is the real widget. Try changing the numbers.

Calculator by smartfin.fyi

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<iframe src="https://smartfin.fyi/embed/mortgage-payoff.html"
        width="100%" height="2410" style="border:0"
        title="Mortgage payoff calculator" loading="lazy"></iframe>
<p style="font-size:12px;margin:6px 0 0">Calculator by <a href="https://smartfin.fyi/mortgage-payoff-calculator.html">smartfin.fyi</a></p>

Notes

It fills whatever width you give it, down to phone screens.
It follows your reader's light or dark mode automatically.
It does not track your visitors. No cookies, no analytics and no outside files. The numbers typed are sent to smartfin.fyi, which works out the result.
A height of 2410 suits most layouts. Increase it if your site uses larger text.
The credit line under the widget is optional. Keep it, delete it, or add rel="nofollow" to its link. The widget works the same either way.

Terms: there aren't many. Use it on any site, including commercial ones, at no cost. We may improve the calculator over time, so the embedded version can change. If it ever needs to be retired, this page will say so first.

The full version

The complete mortgage payoff calculator on smartfin.fyi adds other extra amounts and rates, month one, the money trail, a chart of both balances, the year-by-year table and the full method.

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Notes

The full version

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