Free embeddable widget
Body Fat Calculator Widget
The U.S. Navy method, embedded free on your site.
- ✓ Free forever
- ✓ No signup or API key
- ✓ Responsive
- ✓ Auto-updating
Live preview
Copy the embed code
Paste this wherever you want the calculator to appear. The second line makes it resize itself to fit its content.
Free to use on any site, commercial or personal. The widget keeps a small “Powered by LensNutra” credit — please leave it in place. Formulas and data update automatically, so your page never goes stale.
How to add it to your site
WordPress
Edit the post or page, add a Custom HTML block, and paste the code. (In the Classic editor, switch to the Text tab first.)
Wix
Click Add → Embed → Embed a Widget, choose Enter Code, and paste.
Squarespace
Add a Code Block to your page and paste the snippet in.
Shopify
In the theme or page editor, add a Custom Liquid or HTML section and paste.
Plain HTML
Paste the snippet anywhere inside your <body>. No script tags or API keys to install.
Why embed a calculator?
An interactive tool keeps readers on the page instead of sending them to Google for the answer. It gives people a reason to come back, and it turns a static article into something useful. This widget is a self-contained iframe, so it can't slow down or interfere with the rest of your page, and there's nothing to maintain — the formulas and nutrition data stay current on our side.
Prefer to link instead of embed? The full Body Fat Calculator is free to use and link to, and there's a complete set of nutrition calculators alongside it.
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