About Us

Freight-class-calculator.us started with a simple problem. Shippers who move pallets a few times a week keep running into the same wall. A bill of lading form asks for a freight class, and nobody explained what that number means. We built this freight class calculator to answer that, plainly and for free.

What We Built

Our calculator takes your pallet’s length, width, height, and weight, and returns a density-based estimate of your NMFC freight class in seconds. No account, no email gate, nothing saved once you close the tab. We built it on the current 13-tier NMFC density scale maintained by NMFTA, the National Motor Freight Traffic Association, the same standard LTL carriers price against, and we keep it updated as that scale changes.

Alongside the calculator, our homepage includes a full NMFC density to class chart, a complete list of all 18 NMFC freight classes, and plain language explanations of the four factors- density, stowability, handling, and liability- that actually decide your final class. We also cover cubic feet, pounds per cubic foot, bill of lading basics, and how to avoid a reclassification fee. Every part of the site exists to answer one real question: what will this shipment actually cost to move, and how do I avoid getting it wrong?

Who This Site Is For

Small business owners shipping their first pallet. Warehouse and shipping staff filling out a BOL under time pressure. Freight brokers and 3PL coordinators who want a fast cross-check instead of digging through an NMFC reference book. DTC brands shipping bulky products for the first time. Procurement and operations staff sanity checking a carrier’s quote before it’s signed off. Truckers and dispatchers confirming a shipment’s density before loading. If any of that sounds like your day, this tool was built for you.

How We Keep This Accurate

We built the calculator’s logic directly from NMFTA’s published density scale, and we update it when the scale changes, most recently reflecting the July 2025 restructuring that added Classes 50 and 55 as new low-density tiers. Every class, density range, and example on this site is checked against that current standard, not an outdated chart carried over from years ago.

That said, we’re upfront about what this tool is and isn’t. It gives a density-based estimate. Your carrier makes the final call, and that call can factor in stowability, handling, and liability beyond density alone. We say this clearly on the calculator itself and throughout the site, because a shipper who trusts an estimate as a guarantee is exactly the shipper who ends up with a surprise reclassification fee. Our disclaimer page covers this in full.

Why Free, No Sign-Up

We don’t think a shipper trying to fill out a bill of lading correctly should have to hand over an email address first. This calculator and every reference page on this site are free to use, with nothing stored after you close the tab. We support the site through standard display advertising, not through selling your data or gating tools behind an account.

Built for Real Freight, Not Just General Cargo

Our density chart and class examples cover common commodity types shippers actually move: machinery, auto parts, electronics, furniture, appliances, clothing, and boxed goods. We map density ranges to the classes carriers actually use, from the densest class 50 freight like steel and heavy equipment, up through class 400 for light, bulky items.

Our Standards

Every page on this site is reviewed against NMFTA’s current published standards before it goes live, and reviewed again whenever those standards change. We correct errors as soon as we find them, and we welcome corrections from carriers, brokers, and shippers who spot something off. You can reach us directly through our contact page.

If you’re ready to get your estimate, head back to the freight class calculator and enter your shipment’s dimensions and weight.