Is embedding the calculators really free?

Yes, free and with no signup. We ask that you keep the attribution line visible, which the generated code includes. You do not need to ask permission and there is no licence key.

Will the embed track my visitors?

No. The embedded calculators carry no analytics, no advertising and no cookies. They run entirely in the browser and send nothing back to us. The only network request is the one that loads the page.

Does the embed work on WordPress, Squarespace and Wix?

Yes. Paste the code into a Custom HTML block in WordPress, a Code block in Squarespace, or an Embed HTML element in Wix. It is a standard iframe with no dependencies, so anywhere that accepts HTML will run it.

Why do you give these away?

Because the attribution link sends a small amount of traffic back to us and helps people find the full versions of the tools. That is the whole arrangement. We would rather the calculators were used than walled off.

Embed Our UK Energy Calculators Free

Home›Embed our calculators

If you write about insulation, heating or retrofit, you can drop one of our calculators straight into your article. Readers get a real answer without leaving your page. We keep the maths current, including the Ofgem cap each quarter, so it does not go stale on you.

1. Pick a calculator

2. Copy the code

Add the auto-height script (stops the inner scrollbar)

3. Check it looks right

Where to paste it

WordPress. Add a Custom HTML block and paste. In the classic editor, switch to the Text tab first.
Squarespace. Add a Code block, set it to HTML, paste.
Wix. Add → Embed Code → Embed HTML, then paste into the HTML code box.
Ghost, Webflow, Notion sites, plain HTML. Paste it wherever raw HTML is allowed.

What the embed does and does not do

It sets no cookies, loads no analytics and runs no advertising. Nothing about your visitors reaches us. The calculation happens in their browser.
It sends one message to the parent page, its own pixel height, so the frame can resize. That is the only thing it communicates.
It carries a visible credit line linking back to the full calculator. Please leave it in place, it is the only thing we ask for.
Figures are estimates. We keep them current against the Ofgem price cap and Energy Saving Trust savings data, but they are not a quote and not advice.

Questions people ask

Is it really free?

Yes, and there is no signup, no key and no usage limit. Keep the attribution line visible and you are done. You do not need to email us first.

Will it track my visitors?

No. The embedded pages carry no analytics, no ad tags and no cookies at all, which is deliberate. If you run a cookie banner, this embed does not add anything to it.

What happens when energy prices change?

We update the defaults when Ofgem publishes a new cap, usually within a few days. Your page picks up the change automatically because the calculator is served from here.

Why give these away?

Because the credit line sends a trickle of traffic back and helps people find the full tools. That is the entire arrangement, and it is worth more to us than keeping the calculators behind our own front door.

Something else you need?

If you want a calculator we have not built, or a version tuned to your audience, say so on the contact page. We also publish our EPC dataset under the Open Government Licence, which is free to chart, quote and reuse the same way.

Calculator methodology: insulation payback · boiler replacement cost. Savings figures from the Energy Saving Trust; unit rates from the Ofgem price cap in force from 1 July 2026. Editorial policy.

Embed Our Calculators, Free