Freight Class Calculator
LTL freight is priced by class, and density is the main factor. Enter the shipment weight and dimensions to see the cubic feet, the density in pounds per cubic foot and the standard NMFC class that density falls into.
How to calculate freight class
- Enter the total shipment weight in pounds.
- Enter the length, width and height in inches.
- Read the cubic feet and the density in pounds per cubic foot.
- See the NMFC freight class that the density maps to.
Examples
Light, low-density shipment
200 lb, 40 x 48 x 48 in
53.3333 cu ft, density 3.75, class 250
Denser shipment
500 lb, 48 x 40 x 48 in
53.3333 cu ft, density 9.375, class 100
Frequently asked questions
How is freight class calculated from density?
Density is the shipment weight divided by its volume in cubic feet. The volume is length times width times height in inches divided by 1728. Higher density means a lower class and usually a lower rate, because dense freight is cheaper to ship per cubic foot.
What is the density-to-class table?
The standard density breakpoints in pounds per cubic foot are: 50 and over class 50, 35 to under 50 class 55, 30 to 35 class 60, 22.5 to 30 class 65, 15 to 22.5 class 70, 13.5 to 15 class 77.5, 12 to 13.5 class 85, 10.5 to 12 class 92.5, 9 to 10.5 class 100, 8 to 9 class 110, 7 to 8 class 125, 6 to 7 class 150, 5 to 6 class 175, 4 to 5 class 200, 3 to 4 class 250, 2 to 3 class 300, 1 to 2 class 400, and under 1 class 500.
Is density the only factor in freight class?
No. The official NMFC system also considers stowability, handling and liability for some commodities, and many items have a fixed class regardless of density. This tool gives the density-based class, which is the right answer for density-rated freight and a strong starting estimate otherwise.
Should I include the pallet in the weight and size?
Yes. Carriers measure the full palletized shipment, so include the pallet weight and measure the overall length, width and height including the pallet and any overhang for an accurate density.
Is my data stored?
No. The calculation runs entirely in your browser. Nothing you type is sent to a server or saved, so your shipment details stay private on your device.
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