Calculator embeds

Embed a calculator on your site

Every Calculator Matters tool can be added to your own website, blog, or intranet, with no setup or API key needed. The embed is a self-contained version of the calculator with a small “Powered by Calculator Matters” credit, so your readers get the full tool and you get a clean, fast widget.

How to add one

  1. Open any calculator on Calculator Matters.
  2. Scroll below the tool and select “Embed this calculator”.
  3. Choose the theme, width, and starting currency that suit your page.
  4. Copy the snippet and paste it into your site’s HTML where you want the calculator to appear.

Prefer to write the snippet yourself? It looks like this — point the iframe at the calculator’s /embed/ URL and include the resizer script once per page:

<iframe
  src="https://calculatormatters.com/embed/finance/mortgage-calculator/?theme=auto"
  title="Mortgage Calculator — Calculator Matters"
  style="width:100%;border:0" loading="lazy"
  data-cm-embed></iframe>
<script async src="https://calculatormatters.com/embed.js"></script>

What you get

  • Responsive and auto-resizing — the embed reports its height so there is never a scrollbar-in-a-scrollbar.
  • Light and dark themes, or “auto” to follow your reader’s system preference.
  • Readers’ inputs stay in their browser — the calculator runs client-side and sends nothing to a server.
  • One small script (about 1.8 KB) powers every embed on the page.

Popular calculators to embed

Browse the full set on the all calculators page — every one has its own embed option. Embeds are offered under our terms of use; please keep the attribution link intact.

Keep results in context

An embedded calculator carries the same standard as the rest of the site: a documented formula, stated assumptions, and results that are educational estimates from the figures your readers enter — never financial, tax, legal, or investment advice, a quote, or an approval. How each tool is built and checked is described in our Methodology, and anything that looks wrong can be reported through the Corrections page — fixes reach every embed automatically.

Embed FAQ

Is embedding free?

Yes. Every embed is free to use on your website, blog, or intranet under our terms of use. The only requirement is that the small “Powered by Calculator Matters” attribution credit stays visible and intact.

Will an embed slow my page down?

It is built not to. The iframe is lazy-loaded, so it only fetches when a reader scrolls near it, and the resizer script is about 1.8 KB and is included once per page no matter how many calculators you embed.

Do embedded results match the calculator on this site?

Yes — the embed loads the same engine and formula as the full calculator page, so results are identical for the same inputs. When we correct or update a calculator, every embed of it updates automatically; there is no snippet to re-copy.

What happens to my readers’ inputs?

Nothing leaves their browser. The calculator runs entirely client-side inside the iframe and sends no entered values to a server, so there is nothing for us — or you — to store about what a reader typed.

Can I present embedded results as advice on my site?

No. Embedded results are the same educational estimates as on Calculator Matters — formula-backed calculations from user-entered inputs and documented assumptions, not financial, tax, legal, or investment advice. Add your own context for your audience, and point readers to a qualified professional for high-stakes decisions.

Find a calculator to embed