Freight Class Calculator

Freight Class Calculator

On this page:

A Freight Class Calculator is a tool used in the shipping and logistics industry to determine the freight class or National Motor Freight Classification (NMFC) code of a particular shipment. Freight class is a standardized system used by carriers to categorize and classify different types of cargo based on various factors. The classification helps determine shipping rates, as freight classes are associated with specific pricing structures. Here's a detailed overview:

Key Components of a Freight Class Calculator:

1. Commodity Description:

A description of the goods being shipped, including details such as size, weight, density, and fragility.

2. Weight of the Shipment:

The total weight of the goods being shipped, usually measured in pounds.

3. Dimensions:

The dimensions of the shipment, including length, width, and height, which can affect the freight class.

4. Density:

The density of the shipment, calculated as the weight per cubic foot.

 Freight Class:

The determined NMFC code or freight class based on the information provided.

How the Freight Class Calculator Works:

The process of determining the freight class involves assessing multiple factors such as density, stowability, handling, and liability. Carriers use this classification to establish shipping rates, and each freight class corresponds to a specific price per hundred pounds. The higher the freight class, the higher the shipping rate.

Freight class is typically assigned based on the NMFC, which is a standard system developed by the National Motor Freight Traffic Association (NMFTA). The NMFC system classifies commodities into 18 classes, ranging from Class 50 (lowest) to Class 500 (highest).

Benefits of Using a Freight Class Calculator:

1. Accurate Pricing:

Helps shippers and carriers accurately price shipments based on standardized criteria.

2. Consistency:

Provides a consistent and objective method for classifying a wide range of goods.

3. Efficiency:

Streamlines the shipping process by automating the classification of goods.

4. Cost Estimation:

Allows shippers to estimate shipping costs before sending a shipment.


1. Accuracy of Information:

The accuracy of the freight class calculation relies on providing accurate and detailed information about the shipment.

2. Changes in Classification:

Certain commodities may be reclassified, and it's important to stay updated with any changes to the NMFC.

3. Carrier-Specific Rules:

Different carriers may have specific rules and guidelines for determining freight class, and it's essential to be aware of these variations.


Let's say you are shipping machinery parts with a total weight of 2,000 pounds and dimensions of 4 feet x 4 feet x 4 feet. The density of the shipment is calculated as the weight (2,000 pounds) divided by the cubic volume (4 x 4 x 4 = 64 cubic feet). The density would be \( \frac{2,000}{64} = 31.25 \) pounds per cubic foot.

Based on this information and other factors such as fragility and handling requirements, the Freight Class Calculator may determine the shipment's freight class to be, for example, Class 150.

In conclusion, a Freight Class Calculator is a useful tool for businesses involved in shipping and logistics to determine the appropriate freight class for their shipments. This classification is critical for accurate pricing and efficient transportation of goods.

Frequently Asked Questions FAQ

What is freight class 70 vs 85?
Freight class is a standardized classification system used in the shipping and transportation industry to categorize different types of goods based on their characteristics. The classification helps determine shipping rates and ensures consistent pricing for various items. Freight classes range from 50 to 500, with lower numbers indicating lower shipping costs. Here's a comparison between freight class 70 and 85: 1. **Freight Class 70:** - Freight class 70 typically includes items that are more durable, less prone to damage, and easier to handle. - Goods in this class are considered lower risk during transportation. - Examples of items in freight class 70 might include household appliances or metal furniture. 2. **Freight Class 85:** - Freight class 85 represents items that are more fragile, more susceptible to damage, or more challenging to handle during transportation. - Goods in this class are considered higher risk and may require more careful handling and packaging. - Examples of items in freight class 85 might include electronic equipment or delicate machinery. It's important to note that the specific criteria for assigning freight classes can vary depending on the carrier and the National Motor Freight Traffic Association (NMFTA) guidelines. The classification is based on factors such as density, handling, liability, and stowability. Shippers typically determine the freight class of their goods when arranging transportation, and this classification is then used by carriers to calculate shipping rates. If you are involved in shipping or logistics, it's recommended to work with your carrier or freight broker to accurately determine the freight class for your specific goods, as misclassification can lead to inaccurate shipping costs and potential issues during transportation.
How do I find my freight class number?
Freight class is a standardized classification system used by freight carriers to categorize different types of cargo for shipping. The National Motor Freight Classification (NMFC) assigns freight class numbers based on various factors, including density, handling, stowability, and liability. To find your freight class number, you can follow these steps: 1. **Determine the Characteristics of Your Freight:** - Consider the nature, size, weight, and other characteristics of your shipment. The NMFC considers factors such as density, handling requirements, and susceptibility to damage. 2. **Consult the NMFC:** - The NMFC is a publication that lists freight classes and their corresponding descriptions. You can access the NMFC directly or through the services of a transportation professional or carrier. 3. **Use the Commodity Classification Lookup Tools:** - Some freight carriers and logistics companies provide online tools or databases that allow you to look up the freight class based on the commodity's characteristics. You may need to provide details such as weight, dimensions, and type of product. 4. **Contact the Carrier or Freight Broker:** - If you are uncertain about the classification or cannot find the information, you can contact the freight carrier or a freight broker. They often have expertise in determining the appropriate freight class based on the information you provide. 5. **Review the NMFC Descriptions:** - Each freight class has a specific description in the NMFC. By reviewing these descriptions, you can find the class that best matches the characteristics of your shipment. 6. **Consider Professional Assistance:** - If you have a complex or specialized shipment, it may be helpful to consult with a transportation professional, logistics expert, or the carrier to ensure accurate classification. Remember that accurate freight class determination is crucial for proper billing, and it can affect shipping rates. Providing precise information about your shipment helps ensure that it is categorized correctly for transportation purposes.

Have Feedback or a Suggestion?

Kindy let us know your reveiws about this page