A shipper’s guide to NMFC codes and freight classification 

Freight classes explained

What changed in July 2025?

New 13-Tier NMFC density scale

SubclassFreight Density
(in lbs per cubic foot)
Freight Class
Sub 1Less than 1400
Sub 21 but less than 2300
Sub 32 but less than 4250
Sub 44 but less than 6175
Sub 56 but less than 8125
Sub 68 but less than 10100
Sub 710 but less than 1292.5
Sub 812 but less than 1585
Sub 915 but less than 22.570
Sub 1022.5 but less than 3065
Sub 1130 but less than 3560
Sub 1235 but less than 5055
Sub 1350 or greater50

Why NMFC codes matter

How to classify your LTL shipment under the new system

Capture accurate dimensions

Use a lookup tool

Revise any stored codes

Consider your packaging

Need help understanding the NMFC classification system? 

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