Free for your website

Free calculators to embed on your site

Short answer: pick a widget below, copy its snippet and paste it into any page. It is free, needs no account or API key, works on WordPress, Squarespace, Wix and plain HTML, and shows no ads or product listings. The only condition is that the credit link to CrunchYourDollars stays in place.

Heating cost by state

Pick a state and see the yearly cost to heat the same 2,000 sq ft home with natural gas, propane, heating oil, electric resistance and a heat pump, cheapest first, from EIA prices and 30-year climate normals. Add ?state=TX (any two-letter code) to the iframe URL to open on your state.

Made for: HVAC contractors, heat pump installers, electric co-ops, utilities and energy-efficiency programs.

See the full heating cost by state

Embed this calculator on your site

Free to use on any site, as long as the credit link stays in place. The script line is optional and makes the frame fit its content.

<iframe src="https://crunchyourdollars.com/embed/heating-cost" title="Heating cost by state" width="100%" height="560" style="border:0;width:100%;max-width:760px" loading="lazy"></iframe>
<p style="font-size:13px">Calculator by <a href="https://crunchyourdollars.com/heating-cost-by-state">CrunchYourDollars</a></p>
<script src="https://crunchyourdollars.com/embed.js" async></script>

Live preview

Generator size calculator

Visitors tick what has to stay on in an outage and get running and starting watts, whether they need a 240V outlet, inverter or open frame, the safe hookup method and fuel per day.

Made for: Electricians, generator installers, prepper and homesteading blogs, emergency management pages and co-op outage pages.

See the full generator size calculator

Embed this calculator on your site

Free to use on any site, as long as the credit link stays in place. The script line is optional and makes the frame fit its content.

<iframe src="https://crunchyourdollars.com/embed/generator-sizer" title="Generator size calculator" width="100%" height="900" style="border:0;width:100%;max-width:760px" loading="lazy"></iframe>
<p style="font-size:13px">Calculator by <a href="https://crunchyourdollars.com/generator-sizer">CrunchYourDollars</a></p>
<script src="https://crunchyourdollars.com/embed.js" async></script>

Live preview

Power station runtime calculator

Type a battery capacity (or pick a model) and an appliance to see how long it runs, plus a quick table for a fridge, CPAP, laptop, TV, space heater and fan.

Made for: Camping, RV and van-life sites, CPAP and medical-device users, prepper blogs and solar installers.

See the full power station runtime calculator

Embed this calculator on your site

Free to use on any site, as long as the credit link stays in place. The script line is optional and makes the frame fit its content.

<iframe src="https://crunchyourdollars.com/embed/power-station-runtime" title="Power station runtime calculator" width="100%" height="720" style="border:0;width:100%;max-width:760px" loading="lazy"></iframe>
<p style="font-size:13px">Calculator by <a href="https://crunchyourdollars.com/power-station-sizer">CrunchYourDollars</a></p>
<script src="https://crunchyourdollars.com/embed.js" async></script>

Live preview

How it works

The snippet is an iframe, a one-line credit link and an optional script. The script listens for the widget's height (only from crunchyourdollars.com) and resizes the frame so there is no inner scrollbar. Leave it out and the frame keeps the height in the snippet; change that number to suit your layout.

The widgets use a light theme with a transparent background, so they sit on any page. The numbers update when we refresh our data: EIA electricity and fuel prices, and the generator engine behind our full tool. Nothing on your page needs maintaining.

Want a widget for another of our calculators? Ask through the contact page.