For site owners
Put a calculator on your site
Copy the code under any calculator below and paste it into your page. It is free, there is no account, and it is an ordinary frame: no script runs on your site, no ads appear in it, and nothing your visitors type is sent to us or to anyone.
What you get
- The same calculator as on this site. It is served from Plain Number, so tax figures and exchange rates are updated here and your page shows the current ones without any work from you.
- Two lines of HTML. A frame, and a credit line under it that links back to us. Keep the credit visible.
- A height you can change. The code sets 820 pixels. Make it taller or shorter to suit your page; the calculator scrolls inside the frame if it needs more room.
Loans & mortgages
<iframe src="https://plainnumber.com/embed/finance/mortgage" title="Mortgage payment calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/finance/mortgage" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/finance/auto-loan" title="Car loan calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/finance/auto-loan" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/finance/extra-payment" title="Extra payment calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/finance/extra-payment" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/finance/rent-vs-buy" title="Rent or buy calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/finance/rent-vs-buy" target="_blank" rel="noopener">Plain Number</a></p>
Salary & pay
<iframe src="https://plainnumber.com/embed/salary/take-home-pay" title="Take-home pay calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/salary/take-home-pay" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/salary/hourly-to-salary" title="Hourly to salary converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/salary/hourly-to-salary" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/salary/employer-cost" title="Employee cost calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/salary/employer-cost" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/salary/budget" title="Monthly budget calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/salary/budget" target="_blank" rel="noopener">Plain Number</a></p>
Trading maths
<iframe src="https://plainnumber.com/embed/trading/prop-firm-challenge" title="Prop firm challenge cost calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/trading/prop-firm-challenge" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/trading/trading-fees-slippage" title="Trading fee and slippage calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/trading/trading-fees-slippage" target="_blank" rel="noopener">Plain Number</a></p>
Converters
<iframe src="https://plainnumber.com/embed/convert/length-converter" title="Length converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/length-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/weight-converter" title="Weight converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/weight-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/temperature-converter" title="Temperature converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/temperature-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/volume-converter" title="Volume converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/volume-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/speed-converter" title="Speed converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/speed-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/area-converter" title="Area converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/area-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/currency-converter" title="Currency converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/currency-converter" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/international-transfer-cost" title="International transfer cost calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/international-transfer-cost" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/age-calculator" title="Age calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/age-calculator" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/date-difference" title="Days between dates" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/date-difference" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/convert/business-days" title="Business days calculator" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/convert/business-days" target="_blank" rel="noopener">Plain Number</a></p>
Kitchen
<iframe src="https://plainnumber.com/embed/kitchen/cups-to-grams" title="Cups to grams converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/kitchen/cups-to-grams" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/kitchen/oven-temperature" title="Oven temperature converter" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/kitchen/oven-temperature" target="_blank" rel="noopener">Plain Number</a></p><iframe src="https://plainnumber.com/embed/kitchen/recipe-scaler" title="Recipe scaler" width="100%" height="820" loading="lazy" style="border:0;max-width:100%"></iframe> <p>Calculator by <a href="https://plainnumber.com/kitchen/recipe-scaler" target="_blank" rel="noopener">Plain Number</a></p>
The terms, in plain words
- Free to use, on personal and commercial sites, with the credit line left visible.
- Estimates, not advice. Every calculator states its limits under the answer. Do not present its results as financial, tax or legal advice, or as a quote from you.
- Shown as it is. Do not cover, crop or restyle the frame so that the limits or the credit are hidden.
- Nothing paid inside it. An embedded calculator carries no advertising, no sponsor and no affiliate link, and what we are paid elsewhere never changes its arithmetic.
- No promise it stays up. We may change a calculator, move it or stop offering embeds. We will not charge you for one you have already placed.
- What reaches us. Nothing your visitors type. Our host does log the request for the frame, as it does for any page; the privacy page says exactly what that is, so you can describe it in your own notice.
The full terms apply as well. Questions, or a calculator you would like added: hello@plainnumber.com.