Freight Class Calculator
Enter your pallet or box dimensions and weight to get the NMFC freight class from density. It uses the 2025 13-subprovision density scale — the same engine as the full FreightPrep calculator.
Fill in all four fields to see the freight class.
How freight class is calculated
Since the July 19, 2025 NMFC restructure, most freight is classified by density — pounds per cubic foot. Density is weight divided by cubic feet, and cubic feet is length × width × height (in inches) ÷ 1,728. The denser the shipment, the lower the class and the lower the rate.
A key move for a shipper: because class comes from density, palletizing so the load is denser (fewer, taller-but-heavier pallets) can drop it into a lower class — sometimes a bigger saving than the extra pallet costs.
NMFC density scale (effective 2025-07-19)
| Density (lbs/ft³) | Freight class |
|---|---|
| ≥ 50 | 50 |
| 35 – 50 | 55 |
| 30 – 35 | 60 |
| 22.5 – 30 | 65 |
| 15 – 22.5 | 70 |
| 12 – 15 | 85 |
| 10 – 12 | 92.5 |
| 8 – 10 | 100 |
| 6 – 8 | 125 |
| 4 – 6 | 175 |
| 2 – 4 | 250 |
| 1 – 2 | 300 |
| < 1 | 400 |
Need the whole quote, not just the class?
FreightPrep turns your boxes into pallets, computes the class of each, and builds a copy-ready LTL summary you can paste into FedEx Freight, LTL Select and other carriers — free, in your browser.
Disclaimer
This tool provides estimates only. Final freight class and rates are set by the carrier and the NMFTA, not by this calculator — the carrier can reweigh and reclassify at pickup. Freight class here is density-based only; the specific commodity’s NMFC item number may override the density-based class shown here.