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Embed a calculator on your site

Every calculator below can run inside your own page — a blog post, a course, a supplier site, a maker community. It is free, it needs no account or API key, and there is nothing to sign.

Adjusts itself after loading, if you include the script.

Preview

What your visitors get

The same calculator that runs on this site, with the same formulas and the same warnings. Calculations happen in your visitor's browser, so nothing they type is sent to us or to you.

Sizing

An iframe does not grow with its content, so an embed would otherwise scroll inside a fixed box. The optional embed.js script listens for a height message from the frame and resizes it to fit. Leave the script out and the embed still works — it just keeps the height you set.

Theme

By default an embed follows your visitor's system setting, light or dark. If your site is always one or the other, pick it above and the embed will match rather than flipping to something that clashes.

What we ask in return

A visible credit link back to the calculator, which is built into the embed and not removable. That link is the only thing we get for giving the tool away. Please do not strip it, hide it with CSS, or frame the embed in a way that covers it.

Terms

Use it on any site, commercial or not. We may change or retire a calculator, so an embed is not a permanent guarantee. Results are estimates based on figures your visitor enters — the same disclaimer that applies here applies to embedded copies.

Embeddable calculators (35)