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Freight class 400What freight class 400 means.
Class 400 is what density-based freight weighing 0 to 1 pounds per cubic foot classifies as. It is subprovision 1 of the thirteen-subprovision density scale.
What lands here
Artificial flowers and lightweight decorative displays. A huge box with almost no weight in it.
That is an example, not a rule. Class 400 is not a kind of product — it is a density. The same item can be class 400 packed one way and something else packed another, which is why no honest list of “class 400 commodities” exists.
What that looks like on a pallet
A standard 48 by 40 pallet stacked to 48 inches is 53.3 cubic feet. To classify as class 400, a shipment on that pallet needs to weigh between 0 and 53 lb.
Add weight and it falls. Over 1 PCF it becomes class 300.
Which is the point: a few hundred pounds, or a few inches of stack height, moves freight between classes. Run your own numbers.
Whether this changed in July 2025
Docket 2025-1 moved a great deal of freight onto this density scale that had previously carried a fixed class. If you ship on an item number that moved, the class you have always used may not be the one a carrier applies now.
Most class charts online predate that change and still list commodities against fixed classes. What changed in Docket 2025-1.
Under one pound per cubic foot. Very little freight is genuinely this light, and a shipment landing here is worth re-measuring before it moves.
Not sure the class you ship on is still right?
Send us up to 10 of the NMFC item numbers you use. We will tell you which are current, which moved in July 2025, and which look wrong for what you actually ship.