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Freight class calculator

Density-based NMFC class estimate for LTL shipping. Part of freightcalcs.com.

Shipment details

Density
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Cubic feet
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Estimated class
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Measure the handling unit as it ships — palletized freight includes the pallet's dimensions and weight. Density-based estimate; the NMFC commodity listing (handling, stowability, liability) can override it.

Density to class chart

Freight classDensity range
Class 50≥ 50 lb/ft³
Class 5535 – 50 lb/ft³
Class 6030 – 35 lb/ft³
Class 6522.5 – 30 lb/ft³
Class 7015 – 22.5 lb/ft³
Class 77.513.5 – 15 lb/ft³
Class 8512 – 13.5 lb/ft³
Class 92.510.5 – 12 lb/ft³
Class 1009 – 10.5 lb/ft³
Class 1108 – 9 lb/ft³
Class 1257 – 8 lb/ft³
Class 1506 – 7 lb/ft³
Class 1755 – 6 lb/ft³
Class 2004 – 5 lb/ft³
Class 2503 – 4 lb/ft³
Class 3002 – 3 lb/ft³
Class 4001 – 2 lb/ft³
Class 500< 1 lb/ft³

Since the NMFTA's 2025 reclassification, most commodities without special handling characteristics are classed purely by this density scale.

Freight class basics

What is freight class?

The NMFC system (classes 50–500) standardizes LTL pricing. Lower class = denser, cheaper-to-ship freight. Class is set by density plus handling, stowability and liability characteristics.

Why does the right class matter?

Carriers reweigh and reclassify freight; a wrong class on the BOL triggers adjustment fees. When in doubt, look up the commodity's NMFC listing or ask your carrier.

What if my shipment is over 12 linear feet?

Volume rules may apply instead — check the linear feet calculator. Planning the pallet itself? Use the pallet calculator.