Freight class 400
Class 400 is the band for freight with a density of 1 to 2 lb/ft³.
The density range
A shipment is class 400 when its density is 1 up to but not including 2 lb/ft³. Density is the total weight of the shipment divided by the total cubic feet it occupies, pallet and packaging included.
A shipment that lands in class 400
A standard 48 × 40 inch pallet, 48 inches tall, weighing 80 pounds.
48 × 40 × 48 = 92,160 cubic inches ÷ 1,728 = 53.33 cubic feet
80 ÷ 53.33 = 1.50 lb per cubic foot → class 400
Freight that usually lands here
Typical examples include deer antlers, unpackaged lightweight assemblies, oversized display pieces.
Treat these as illustrations rather than a lookup. Density decides the band, so the same product can fall either side of a line depending on how it is packed, palletised and wrapped.
What to watch on class 400
Rare in general commerce. If your calculation lands here, verify the weight first — a mistyped weight is a more likely explanation than genuinely shipping something this light.
Where class 400 sits
The next band down is class 300, which covers denser and cheaper freight. The next band up is class 500, for lighter freight at a higher rate.
Work out your own class
Enter your dimensions and weight and the calculator returns cubic feet, density and the class, and tells you if you are sitting close to a boundary.
Open the freight class calculator