What Is Freight Class and How To Calculate It (Plus, Get Your Printable How-To Guide)

As a shipper, you probably have asked at one point or another “what is freight class?” You’ve probably even wondered “how to calculate freight class.” With everything that a shipper needs to know, it can get confusing. In our guide below, we cover everything you need to know about freight classes. We even provide a downloadable tip sheet that you can print out and keep handy!

What is freight class?

Freight classes are designed to help you get common standardized freight pricing for your shipment when working with different carriers, warehouses, brokers and third-party logistics (3PL) providers. Freight classes are defined by the National Motor Freight Traffic Association (NMFTA) and made available through the National Motor Freight Classification (NMFC).

Role of freight classification in LTL shipping

Determining your shipment’s freight class is a vital step to effectively managing LTL freight. It’s a big factor in determining your freight hard costs, but also is a very important factor when it comes to dealing with any possible freight claims.

Additionally, some of the most common shipping problems are often related to not understanding what LTL freight class to choose. Some shippers may find it easy to randomly select a class or stick with one they have always used. However, this will hurt you in the long run. Shippers may save money on the freight shipment by picking a lower class, but time is wasted when the carrier reclasses the shipment and the invoice doesn’t match the expected costs.

A little education, especially when it comes to freight class, can really help you save money, time, resources and, most importantly, avoid delays in getting freight inbound or outbound to your customer.

Why is the NMFC important?

In the United States, each commodity or type of product is assigned a National Motor Freight Classification (NMFC) code and corresponding class for less than truckload (LTL) freight shipments. The NMFC system is a standardized method designed to give consumers a uniform pricing structure when transporting freight. There are 18 classes that a shipped package may fall under with class 50 being the least expensive, to class 500 as the most expensive. The number assigned to an item is important to LTL carriers in determining the tariffs, which in turn determine the price charged to the customer.

How to calculate freight class

Before you determine your freight class for your shipment, you must identify certain factors about your specific freight. LTL freight class is based on weight, length and height, density, ease of handling, value and liability from things like theft, damage, breakability and spoilage. The definitions for each are as follows:

(Weight, Length, Height) Freight Density and Value

Freight density is the space the item occupies in relation to its weight. Density guidelines assign classification 50 to freight that weighs 50 pounds per cubic foot. The Commodity Classification Standards Board (CCSB) assigns classifications 70, 92.5, 175 and 400 to freight with densities of 15, 10.5, 5 and 1 pound per cubic foot, respectively.

Freight that is less dense than one pound per cubic foot is classified as 500. The density is calculated by dividing the weight of the item in pounds by its volume in cubic feet. Your item’s volume in cubic feet is Length x Width x Height/1,728, where all dimensions are measured in inches. The density of your item = Weight/Volume, where Weight is measured in pounds and Volume is measured in cubic feet.

Stowability

Most freight stows well in trucks, trains and boats, but some articles are regulated by the government or carrier policies. Some items cannot be loaded together. Hazardous materials are transported in specific manners. Excessive weight, length or protrusions can make freight impossible to load with other freight. The absence of load-bearing surfaces makes freight impossible to stack. A quantifiable stowability classification represents the difficulty in loading and carrying these items.

Handling

Most freight is loaded with mechanical equipment and poses no handling difficulties, but some freight, due to weight, shape, fragility or hazardous properties, requires special attention. A classification that represents ease or difficulty of loading and carrying the freight is assigned to the items.

Liability

Liability is the probability of freight theft or damage, or damage to adjacent freight. Perishable cargo or cargo prone to spontaneous combustion or explosion is classified based on liability and assigned a value per pound, which is a fraction of the carrier’s liability. When freight classification is based on liability, density must also be considered.

What are the 18 different types of freight class?

View our LTL freight class chart below to help identify freight class.

Class Name	Cost	Notes, Examples	Weight Range Per Cubic Foot
Class 50 – Clean Freight	Lowest Cost	Fits on standard shrink-wrapped 4X4 pallet, very durable	over 50 lbs.
Class 55		Bricks, cement, mortar, hardwood flooring	35-50 lbs.
Class 60		Car accessories & car parts	30-35 lbs.
Class 65		Car accessories & car parts, bottled beverages, books in boxes	22.5-30 lbs.
Class 70		Car accessories & car parts, food items, automobile engines	15 to 22.5 lbs.
Class 77.5		Tires, bathroom fixtures	13.5 to 15 lbs.
Class 85		Crated machinery, cast iron stoves	12-13.5 lbs.
Class 92.5		Computers, monitors, refrigerators	10.5-12 lbs.
Class 100		boat covers, car covers, canvas, wine cases, caskets	9-10.5 lbs.
Class 110		cabinets, framed artwork, table saw	8-9 lbs.
Class 125		Small Household appliances	7-8 lbs.
Class 150		Auto sheet metal parts, bookcases,	6-7 lbs.
Class 175		Clothing, couches stuffed furniture	5-6 lbs.
Class 200		Auto sheet metal parts, aircraft parts, aluminum table, packaged mattresses,	4-5 lbs.
Class 250		Bamboo furniture, mattress and box spring, plasma TV	3-4 lbs.
Class 300		wood cabinets, tables, chairs setup, model boats	2-3 lbs.
Class 400		Deer antlers	1-2 lbs.
Class 500 – Low Density or High Value	Highest Cost	Bags of gold dust, ping pong balls	Less than 1 lbs.

How about true density-based freight class?

Absent of any unusual or significant handling, stowability or liability characteristics, density is of prime importance in the assignment of classes. The CCSB has developed density guidelines that are based on the precedent of pertinent administrative as well as classification decisions. The present guidelines are below.

The density guidelines are used in the assignment of freight classes where the average density of a particular commodity or group of commodities is representative or reflective of the range of densities exhibited by that commodity or commodity group. Furthermore, the density/class relationships set forth in the guidelines presume that there are no unusual or significant handling, stowability or liability characteristics, which would call for giving those characteristics additional or different “weight” in determining the appropriate class.

Commodities or commodity groups exhibiting a wide density range not accurately reflected by a single overall average density may be assigned density-based classes; especially where there are no unusual or significant handling, stowability or liability characteristics and where there is no other feasible means of effectively narrowing the range. And where densities are distributed throughout the range, commodities or commodity groups may be assigned classes predicated on a full density scale. In this regard, full-scale density classifications should generally provide the following standard progression:

Class	Examples	Weight Per Cubic Foot
Class 60	Fits on standard shrink-wrapped 4X4 pallet, very durable	Over 30 lbs.
Class 65	Car accessories & car parts, bottled beverages, books in boxes	22.5 – 30 lbs.
Class 70	Car accessories & car parts, food items, automobile engines	15 – 22.5 lbs.
Class 85	Crated machinery, cast iron stoves	12 – 15 lbs.
Class 92.5	Computers, monitors, refrigerators	10 – 12 lbs.
Class 100	Boat covers, car covers, canvas, wine cases, caskets	8 – 10 lbs.
Class 125	Small Household appliances	6 – 7 lbs.
Class 175	Clothing, couches stuffed furniture	4 – 6 lbs.
Class 250	Auto sheet metal parts, aircraft parts, aluminum table, packaged mattresses, bamboo furniture, mattress and box spring, plasma tv	2 – 4 lbs.
Class 300	Deer antlers, Cans of food, Cutlery	1 – 2 lbs.
Class 400	Bags of gold dust, ping pong balls	< 1 lbs.

Freight class example

Find the NMFC number based on the description in the NMFC book or by using a software program such as ClassIT or FastClass.

The NMFC for mats or matting (floor) in packages is 70970. To properly freight class a shipment of one pallet of mats or matting (floor) we need to know the pallet dimension and weight.
This product ships on a standard pallet. The dimensions are 48” x 40” x 45.5”, and the weight including pallet is 275 pounds.
Calculate volume (length x width x height): 48” x 40” x 45.5” = 87,360 cubic feet.
Convert to cubic feet: 87,360” / 1,728 = 50.6 cubic feet
Calculate density (weight/volume): 275 pound/50.6 cubic feet = 5.4 pounds per cubic foot)

So, using the chart above, we can conclude that the freight class would be 175.

As an industry-leading 3PL, GlobalTranz can help you set up processes and empower you with technology to make freight classification easier and automated. As a shipper, that’s important. Getting freight class wrong will cost you. If you incorrectly classify your item to be shipped it can be reclassified by the freight carrier. Disputing this is difficult, time-consuming and you will be charged the difference (usually without a discount).

Need help classifying your LTL Freight Shipping?

Partner with GlobalTranz to get access to best-in-class LTL shipping solutions, including services, tools and technology that help you manage freight classification. To learn more about how we can help you, reach out to one of our shipping experts today!