Freight Class Calculator

Calculate your freight density and determine the proper NMFC code for your freight shipment.

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Determining the proper freight class is important to avoid delays and unnecessary reclassification fees. Enter your details into Unishippers’ easy-to-use freight density calculator to help you choose the correct freight class for your shipment needs.

How to Determine Freight Code

1. Determine NMFC Freight Class Code
Freight class codes, or NMFC code, is catalogued in the National Motor Freight Classification. There are a total of 18 possible freight classes ranging from Class 50 (the least expensive) to Class 500 (the most expensive). The higher the class of the shipment, the higher the rate for every hundred pounds you ship.

There are multiple factors to consider in determining the class of your freight shipment:

  • Contents of the shipment
  • Value of the shipment
  • Susceptibility of the shipment to damage
  • Loadability and handling characteristics of the shipment

If you don’t have access to NMFC codes, you can order a freight class chart from the National Motor Freight Association (NMFTA) or contact Unishippers here.

2. Determine Freight Class
Some classifications are density-based, meaning the ratio of weight to dimensions of your shipment will influence shipping cost. You can calculate the density of your shipment by first measuring your cargo in inches. You will need the length, width, height, and weight of your package. Once you know that, you can simply enter the figures into our freight density calculator on this page.

Here are some quick tips to ensure that your density calculation is correct:

  • Round to the nearest inch
  • Use an accurate shipping scale
  • Include the packaging in your weight measurement, this includes pallets, boxes, crates, etc.

How to Properly Class Freight Shipments

Learn more about proper classification of your freight shipment with our freight classification video:

Freight Density Calculator

Length (inches)
Width (inches)
Height (inches)
Weight (pounds)
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