Freight Density Calculator

Enter the length, width, height and weight of your cargo. Our freight density calculator will instantly show its freight density. Pair your calculated density to determine freight class, below.

Freight Density Calculator

There are many factors that determine your freight class, aside from density, so these are estimates only.

Freight Density Table

Density: Estimated Freight Class:
Less than 1 400
More than 1, but less than 2 300
More than 2, but less than 4 250
More than 4, but less than 6 175
More than 6, but less than 8 125
More than 8, but less than 10 100
More than 10, but less than 12 92.5
More than 12, but less than 15 85
More than 15, but less than 22.5 70
More than 22.5, but less than 30 65
30 or greater 60


What is Freight Density?

Freight density is the measurement of the shipment’s compactness or pounds per cubic foot (PCF). You will need to know your freight density when using a density-based carrier or when the NMFC for your shipment is Not Otherwise Indicated (NOI). Our freight density calculator will help you estimate your cargo’s density and freight class.

Read more: What is Freight Density and How Does it Affect Freight Costs?


How to Calculate Freight Density


(height x width x depth) = cubic inches

cubic inches / 1728 = cubic feet

cubic feet / weight = freight density



Step 1. Measure the height, width, and depth of the shipment in inches. Measure to the farthest possible points. On shipments with multiple pieces, repeat Step 1 for each piece.

Step 2. Multiply the three measurements (height x width x depth). The result is the total cubic inches of the shipment. If you have multiple pieces, multiply the height x width x depth for each piece. Take the results for each piece and add them together to get the total cubic inches

Step 3. Divide the total cubic inches by 1,728 (the number of cubic inches in a cubic foot). The result is the cubic feet of the shipment.

Step 4. Divide the weight (in pounds) of the shipment by the total cubic feet. The result is the pounds per cubic foot, i.e., density.

  • For multiple pieces, add the weight of each piece together before dividing by the total cubic feet of the shipment.
  • Round fractions to the nearest full cubic foot number.

Calculating freight density will also provide you with a recommended class for your shipment. The freight class chart below is an abbreviated scale you can use to help estimate the freight classification for your shipments.



Sign-Up For Our Monthly Newsletter

Transportation industry tools, insights and information – straight to your inbox.

Join 15,000+ drivers and business owners who get helpful insights and important news delivered to their email every month.

Newsletter Signup

nl signup graphic