Freight Class Calculator

Simplify the shipping process, reduce costs, and ensure accurate classification for every package. Streamline your logistics and experience hassle-free shipping today





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Understanding Freight Class Calculator: 

In the realm of logistics and shipping, efficiency reigns supreme. Calculating freight class is an integral part of this process, shaping the way shipments are priced and handled. Understanding the nuances of a Freight Class Calculator is crucial for businesses seeking to streamline their shipping operations, optimize costs, and ensure smooth logistics management.

What Is a Freight Class Calculator?

A Freight Class Calculator is a pivotal tool used in the freight industry to determine the appropriate freight class for shipments. It categorizes goods based on various factors like density, stowability, handling, and liability, assigning a corresponding class number that impacts shipping costs.

The concept of freight class is particularly relevant in less-than-truckload (LTL) shipping, where multiple shipments from different shippers are consolidated onto a single truck. It helps carriers and shippers understand the nature of the goods being transported and assign appropriate rates and handling procedures.

Freight Class Calculator Formula and Examples:

The calculation of freight class involves a nuanced formula that considers various factors to accurately categorize shipments. While there isn't a single universal formula, understanding the key elements that influence freight class determination is essential.

Factors Influencing Freight Class Calculation:


Density Calculation:


Density = Weight (in pounds) / Volume (in cubic feet)

For instance, if you have a shipment weighing 500 pounds and occupying 50 cubic feet:

Density = 500 pounds / 50 cubic feet = 10 pounds per cubic foot


NMFC Codes:


National Motor Freight Classification (NMFC) codes categorize commodities based on characteristics like fragility, density, and handling requirements. Each code corresponds to specific goods and aids in determining the appropriate freight class.


Class Determination:


Freight class ranges from 50 to 500, with lower numbers indicating high-density, less fragile items (lower freight costs) and higher numbers for less dense or more fragile goods (higher freight costs).

Examples of Freight Class Calculation:

Example 1:

You're shipping marble tiles weighing 2,000 pounds and occupying 200 cubic feet.

Density = 2,000 pounds / 200 cubic feet = 10 pounds per cubic foot

Based on the density, the freight class could fall in a lower range (e.g., Class 60).

Example 2:

For a shipment of lightweight but bulky items like pillows, weighing 500 pounds and occupying 1,000 cubic feet:

Density = 500 pounds / 1,000 cubic feet = 0.5 pounds per cubic foot

Such low-density shipments might fall into higher freight classes (e.g., Class 250 or higher).

How Does a Freight Class Calculator Work?

The calculation process involves several parameters, each influencing the classification of the freight:


The density of the goods being shipped plays a significant role. Items with a higher density are often classified in lower freight classes due to their compactness, resulting in lower shipping costs.


Factors like irregular shapes or fragility affect stowability. Goods that are difficult to store or stack may be assigned to higher freight classes, impacting the overall shipping expenses.

Handling and Liability:

The ease of handling and the potential risk of damage or liability during transportation contribute to the classification. Fragile, hazardous, or high-value items might be placed in higher freight classes due to increased handling care or liability concerns.

NMFC Codes

The National Motor Freight Classification (NMFC) system assigns codes to various commodities, aiding in determining the appropriate freight class. These codes outline specific characteristics of goods, facilitating accurate classification.


If you to know the discount on your shipment cost, you may calculate it by using our discount calculator.

Freight Class Chart:

Here's a general overview of how different types of freight might align with freight class codes and their respective weights per cubic foot:

Freight Class Code Type of Freight Weight per Cubic Foot
50 Heavy, dense goods Over 50 lbs/ft³
55 Durable, low-density items 35 - 50 lbs/ft³
60 Common durable goods 30 - 35 lbs/ft³
65 Higher value, less dense 22 - 30 lbs/ft³
70 Moderate value, moderate density 15 - 22 lbs/ft³
77.5 Fragile or hazardous materials 13 - 15 lbs/ft³
85 Bulky or difficult to handle 12 - 13 lbs/ft³
92.5 Very low-density items 10 - 12 lbs/ft³
100 Extremely delicate or valuable 9 - 10 lbs/ft³
110 Very fragile, high-value 8 - 9 lbs/ft³
125 Ultra-lightweight, high-value 7 - 8 lbs/ft³
150 Very high-value, low-density 6 - 7 lbs/ft³
175 Extremely fragile or high-liability 5 - 6 lbs/ft³
200 Perishable or specialized 4 - 5 lbs/ft³
250 Ultra-low density, oversized 3 - 4 lbs/ft³
300 Exceptionally low-density 2 - 3 lbs/ft³
400 Extremely low-density, high-risk 1 - 2 lbs/ft³
500 Extremely low-density, ultra-high value Below 1 lb/ft³

Importance of Understanding Freight Class for Businesses:

Cost Optimization:

Understanding freight class is pivotal for businesses aiming to optimize shipping costs. Accurate classification ensures that companies pay the right amount for shipping, preventing overcharges or unexpected expenses.

Logistics Efficiency:

Proper classification streamlines logistics processes, ensuring smoother transportation, reduced handling issues, and better warehouse management. This efficiency translates to improved customer satisfaction and operational reliability.

Pricing Transparency:

Knowledge of freight class enables businesses to negotiate better pricing with carriers. By understanding the classification criteria, companies can strategize and leverage their position during negotiations, leading to cost savings.

How to Calculate Freight Class?

The calculation process involves several steps:

Gather Information:

Collect comprehensive details about the shipment, including weight, dimensions, and the nature of the goods.

Identify NMFC Codes:

Determine the NMFC codes corresponding to the items being shipped. Calculate Density: Calculate the density of the goods by dividing the total weight by the total volume.

Consult Classification Tables:

Refer to NMFC classification tables to match the gathered information and determine the correct freight class.

The Role of the Freight Class Calculator:

A Freight Class Calculator is a digital tool that automates the classification process by considering various parameters and generating the correct freight class. Here's how it simplifies the shipping process:

Efficiency and Accuracy:

Freight Class Calculators utilize algorithms that take into account multiple factors, such as density, handling requirements, and liability, to accurately determine the appropriate freight class. This eliminates the potential for human error and ensures precise calculations.


 Manually calculating freight class can be a time-intensive task, especially for businesses with a high volume of shipments. Freight Class Calculators can provide instant results, saving valuable time for logistics professionals.

Cost Optimization:

By accurately determining the correct freight class, businesses can avoid overpaying for shipping services. This cost optimization contributes to better overall supply chain management and reduced operational expenses.

Transparent Decision-Making:

Freight Class Calculators provide transparent calculations, allowing shippers to understand how each parameter contributes to the assigned freight class. This insight aids in better decision-making and negotiation with carriers.

Integration with Systems:

Many modern Freight Class Calculators can be integrated with shipping management software and e-commerce platforms, ensuring seamless classification and cost calculation for each shipment.


In today's fast-paced business environment, efficient and accurate logistics management is crucial for staying competitive. The Freight Class Calculator stands as a valuable tool that simplifies the process of determining freight class, optimizing shipping costs, and enhancing overall supply chain efficiency. By leveraging technology to automate this critical aspect of logistics, businesses can achieve better cost control, streamline operations, and ensure a smoother shipping experience for themselves and their customers....


Frequently Asked Questions FAQ

What is a Freight Class Calculator?
A Freight Class Calculator is an online tool that helps determine the appropriate freight class for shipping various types of goods. It assists in categorizing shipments based on density, handling, value, and other factors, ensuring accurate pricing and efficient transportation
Why is it important to use a Freight Class Calculator?
Using a Freight Class Calculator is crucial because it ensures that your shipments are accurately classified, preventing billing discrepancies and potential shipping delays. It helps you avoid costly mistakes and optimize your shipping costs.
How does the Freight Class Calculator work?
The Freight Class Calculator typically requires inputs such as weight, dimensions, commodity type, and any special handling requirements. It then calculates the correct freight class based on industry-standard classification guidelines.

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