How to Calculate LTL Freight Class for Shipping from South Florida

Understanding LTL Freight Classification

Freight class is the single most important factor in LTL shipping pricing. The National Motor Freight Classification (NMFC) system assigns classes from 50 to 500 based on four characteristics — density, handling, stowability, and liability. Getting your freight class right means accurate quotes and no surprise re-classifications that inflate your shipping costs.

The Four Classification Factors

Density is the most influential factor — how much your freight weighs relative to the space it occupies. Heavier, denser freight gets lower classes and lower rates. Handling considers whether special equipment or care is needed. Stowability addresses whether freight can be loaded with other commodities. Liability accounts for theft risk, perishability, and damage susceptibility.

Density-Based Classification

Many NMFC items now use density-based rating where the freight class is determined entirely by pounds per cubic foot. To calculate density, multiply length by width by height in inches, divide by 1,728 to get cubic feet, then divide weight by cubic feet. A pallet weighing 500 pounds occupying 30 cubic feet has a density of 16.7 PCF — typically Class 70.

Common Freight Classes for South Florida Shippers

Class 50 (highest density, lowest cost) includes heavy manufactured goods, cement, and hardware. Class 70-85 covers most palletized consumer goods, food products, and auto parts commonly shipped from South Florida. Class 100-150 includes furniture, electronics, and lighter manufactured products. Class 200+ covers low-density items like mattresses and display racks.

Avoiding Freight Re-Classification

Carriers regularly audit shipments and reclassify freight that doesn’t match the declared class. Re-class charges can add 20-50% to your shipping cost. Accurate measurements, correct NMFC codes, and honest descriptions prevent re-classification. Go Freight’s freight experts verify classification before every shipment.

FAK Agreements for Volume Shippers

Freight All Kinds (FAK) agreements assign a single freight class to all your shipments regardless of commodity. These negotiated agreements simplify pricing for businesses shipping diverse products. Go Freight negotiates FAK rates with major LTL carriers for qualifying South Florida shippers.

When Classification Gets Complicated

Mixed-commodity pallets, kitted products, and assembled items sometimes fall between NMFC categories. Our team provides classification assistance for complex shipments, ensuring accurate coding from our warehouse and shipping operations every time.