22.5 - 30 pcf · NMFC density scale
The rating for freight at 22.5 - 30 pounds per cubic foot on the current 13-band NMFC density scale. Typically bottled drinks, boxed car parts, packaged food.
Class 65 covers the 22.5 - 30 pcf band, which catches a lot of everyday industrial freight: bottled beverages, boxed automotive parts, dense packaged food. The band is wide at 7.5 pcf, so most shipments sit comfortably inside it rather than on an edge.
Worked example. A standard pallet: 48 × 40 × 40 in, 1150 lb. That is 44.4 cu ft and 1150 lb → 25.88 pcf → class 65. Open this example in the calculator →
Where the edges are. On that same 48 × 40 × 40 in pallet (44.4 cu ft), class 65 covers every weight from 1,000 lb up to 1,333 lb; at 1,334 lb it rates class 60 and at 999 lb it rates class 70. Enter your own shipment in the calculator and it tells you how far you are from either edge.
Band edges are inclusive at the bottom, exclusive at the top: exactly 22.5 pcf is class 65, but just below it the class gets more expensive — 22.49 pcf rates class 70. A few pounds of packaging or an inch of pallet height can move a borderline shipment across that line.
Freight quoted in this band, with the density logic and a worked example for each: auto parts · batteries · books · food · machinery · printed material.
Freight class runs from 50 (densest, cheapest per pound) to 400 on the current density scale. Class 65 is band 4 of 13.
Either side of this band: denser freight (30 - 35 pcf) rates class 60, which is cheaper; lighter freight (15 - 22.5 pcf) rates class 70, which costs more.
The full table is on the freight class chart, and the calculator works out density and class from your dimensions, including multi-pallet shipments.