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  • Kevin Kennedy

How to Determine NMFC Freight Class

Updated: Jun 29, 2018

Understanding how LTL freight classes are assigned can save you time and money, and may even prevent future headaches. This quick, simple guide breaks down the process for you.


LTL freight pricing is regulated by the National Motor Freight Traffic Association (NMFTA). Any LTL cargo you ship will be assigned a National Motor Freight Classification (NMFC) class. The four main factors considered are density, handling, stow-ability, and liability.

  • Density: Weight of your cargo per cubic feet. Standardized and regulated by the Commodity Classifications and Standards Board (CCSB). Calculated by dividing weight in pounds by volume in cubic feet.

  • Handling: Cargo that is particularly fragile, heavy, hazardous, or of irregular size or shape can impact NMFC Class.

  • Stow-ability: Items that can't be stacked or stored with other items due to size, shape, or hazardous contents can impact NMFC Class.

  • Liability: Content with increased likelihood of theft or damage, i.e. if cargo is combustible or perishable, can impact NMFC Class.

There are 18 different freight classes. Which class your product fits under depends on its weight per cubic foot. In order from Cheapest to most expensive, they are:

  • Class 50 – Over 50 pounds per cubic foot

  • Class 55 – 35-50 pounds per cubic foot

  • Class 60 – 30-35 pounds per cubic foot

  • Class 65 – 22.5-30 pounds per cubic foot

  • Class 70 – 15 to 22.5 pounds per cubic foot

  • Class 77.5 – 13.5 to 15 pounds per cubic foot

  • Class 85 – 12-13.5 pounds per cubic foot

  • Class 92.5 – 10.5-12 pounds per cubic foot

  • Class 100 – 9-10.5 pounds per cubic foot

  • Class 110 – 8-9 pounds per cubic foot

  • Class 125 – 7-8 pounds per cubic foot

  • Class 150 – 6-7 pounds per cubic foot

  • Class 175 – 5-6 pounds per cubic foot

  • Class 200 – 4-5 pounds per cubic foot

  • Class 250 – 3-4 pounds per cubic foot

  • Class 300 – 2-3 pounds per cubic foot

  • Class 400 – 1-2 pounds per cubic foot

  • Class 500 – Less than 1 pound per cubic foot

Again, the lower the number, the cheaper the price per pound. So class 50, also known as clean freight, is cheapest per pound, while class 500, also known as low density/high value, is the most expensive.


And that's about it. Armed with this information, you will know exactly what to expect next time you ship LTL.

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