Freight Class Density Converter

For LTL freight classed by density, the class depends on how many pounds each cubic foot of the handling unit weighs: the denser the freight, the lower the class and usually the cheaper the rate. This converter turns pallet dimensions and weight into density and the matching class on the 13-tier NMFC density scale that took effect on 19 July 2025, and shows how far you are from the next cheaper class.

How to use this tool

1. Measure the handling unit at its greatest length, width and height, including the pallet and any overhang.
2. Enter the full weight of one unit, pallet and wrap included, and the number of identical units.
3. Or enter a known density to convert it straight to a class.
4. Read the class, then check the height or weight that would reach the next class break.

Formula

Density (lb/ft³) = weight in pounds ÷ (length × width × height in inches ÷ 1,728)

There are 1,728 cubic inches in a cubic foot. Each class covers a density range, from Class 400 below 1 lb/ft³ to Class 50 at 50 lb/ft³ or more. The 2025 scale added Classes 55 and 50 at the dense end.

Example

A 48 × 40 × 48 in pallet weighing 600 lb takes 92,160 cubic inches, or 53.33 cubic feet. Its density is 600 ÷ 53.33 = 11.25 lb/ft³, which falls in the 10 to less than 12 band: Class 92.5. Class 85 starts at 12 lb/ft³, so trimming the load to a height of 45 in at the same weight, or reaching 640 lb at the same size, would drop it a class.