Freight Class Calculator

Freight class (NMFC class) is a US LTL (Less than Truckload) pricing system that rates cargo on a scale from Class 50 (densest, cheapest) to Class 500 (lightest, most expensive). Class determines the per-CWT (hundredweight) rate a carrier will charge. It is set by the National Motor Freight Traffic Association based on density, stowability, handling, and liability.

NMFC classification is based on four characteristics: density (weight per cubic foot), stowability (how easily the item can be loaded), handling (difficulty and risk in handling), and liability (value per pound and susceptibility to damage). For most commodity types, density is the primary determinant — but high-value, fragile, or unusually shaped items may be classified above their density alone would suggest.

Most standard manufactured goods fall between Class 65 and Class 100, with densities of roughly 9–22 lb/ft³ (145–350 kg/m³). Food and beverage products, car parts, and packaged hardware typically fall in Class 65–85. Furniture, clothing, and electronics often fall in Class 125–250 due to low density.

Denser packing reduces density-based class. Right-size cartons, compress compressible goods, and remove unnecessary void fill or oversized packaging. Palletising loose items can sometimes improve stowability rating. However, class reductions only apply if the commodity permits — some items have fixed NMFC classes regardless of density.

Freight density is a raw measurement (lb/ft³ or kg/m³). NMFC class is the pricing classification derived from density and other factors. Two shipments with the same density but different commodities may have different classes. This calculator provides a density-based guide; the actual class requires commodity lookup in the NMFC tariff or confirmation from your carrier.

This is a planning guide based on density banding. Actual LTL pricing requires: the confirmed NMFC item number for your commodity, your carrier's base rate tariff, any fuel surcharges or accessorial charges, and any negotiated discounts. Use this tool to understand roughly which class tier your cargo falls in and whether packing changes would shift the class — then get a firm quote from your carrier or freight broker.