Free Freight Class Calculator Widget

Add a free, interactive freight class calculator to your logistics blog or site. One line of HTML — no signup, no API key, works anywhere. Your readers get an instant density-based class estimate; you get a useful tool on your page.

Live preview

This is exactly what your visitors will see:

Copy & paste this snippet

Paste it into any HTML page or blog post where embeds are allowed:

<iframe src="https://freightapis.dev/widgets/freight-class" width="100%" height="440" style="border:1px solid #e5e3da;border-radius:12px;max-width:460px" title="Freight Class Calculator" loading="lazy"></iframe>

Notes

Free to use, no attribution required (a small "Powered by FreightAPIs" link is included).
The calculator runs entirely in the iframe — it sends no data anywhere.
Adjust width / height to fit your layout.
Results are a density-based estimate; the official NMFC class also considers handling, stowability, and liability.

Need the real NMFC class in your app?

Look up authoritative NMFC codes and freight class programmatically with the FreightAPIs NMFC API.

View API Docs Full Calculator