Updated 8/25/2025



Summary: Understanding the freight class of your shipment will help you get an accurate quote and avoid reclassing charges. The NMFC made some key changes on July 19, 2025 that all shippers need to be aware of.

Key Takeaways in This Article:

  • What Are Freight Classes?
  • Why Are Freight Classes Important?
  • How Do Freight Classes Work?
  • How Do You Determine Freight Class?
  • What Are the Most Common Freight Classes?
  • What’s an NMFC Code?
  • Can You Calculate Freight Class on Your Own?

 

What Are Freight Classes?

Its freight class can tell you a lot about a commodity. Most importantly, an item’s freight class speaks to its “transportability”—how difficult or easy it is to ship. With this information, a carrier, a 3PL, or a freight forwarder can tell you how much it will cost to ship.

In other words, freight classes offer a standardized way to classify less-than-truckload (LTL) freight shipments, making them easier to price.

In this article, we’ll walk you through everything you need to know about freight classes, including what they are, what they’re based on, and how you can determine the freight class for your own shipments.

First, let’s talk about why freight classes are so important to the logistics industry.

Why Are Freight Classes Important?

Freight classification simplifies and standardizes many elements of the shipping process.

This standardization makes it easier for all of the parties involved in moving a shipment to classify and price their services. After all, getting freight from its origin to its destination involves evaluating a number of variable elements and coordinating a number of different parties.

 

First and foremost, every freight shipment is different.

  • Even when you’re sending goods packed on a standardized pallet, some are significantly heavier than others. (Think about moving a pallet of bricks versus a pallet of pillows!)
  • Freight shipments will also vary in size.
  • Additionally, some shipments may require special care to avoid breakage or damage.
  • And, finally, some commodities may carry extra liability. For example, they may be more likely to be stolen or damaged.

Freight classes take into account all of these factors in order to ensure each shipment is packed and handled correctly.

In addition to the fact that every shipment is different, each shipment may pass through a number of different parties—over-the-road carriers, warehouse staff, and freight forwarders, just to name a few.

Freight classes give all of these parties a standard system so they know what to expect and how to price their piece of the puzzle.

Additionally, if you’re the party shipping the freight, knowing the freight class of your goods will help you get an accurate shipping estimate. If you get the freight class wrong, your shipment will need to be re-classed, which can result in extra charges. In fact, you may want to talk with an expert to ensure you have the freight class correct to avoid this very scenario.

Now that you know the “why” behind freight classes, let’s take a closer look at the specifics.

How Do Freight Classes Work?

Every LTL freight shipment is put into one of 18 freight classes, as defined by the National Motor Freight Traffic Association (NMFTA). Typically, the higher the freight class, the more expensive your goods are to ship. 50 is the lowest class and, therefore, usually the least expensive. 500 is the highest freight class—the most costly.

How Do You Determine Freight Class?

To determine the freight class of a shipment, four elements are assessed:

How dense is the commodity being shipped? In other words, what’s its weight as compared to its volume? ( Read more on how to measure your freight and calculate its density.)

What is the size and shape of the commodity?

What kind of care is necessary?

How valuable is the commodity? And how susceptible is it to theft, damage, or perishability?

After these characteristics are evaluated, the commodity will be grouped into one of the standard 18 freight classes, which will factor heavily into the cost to ship it.

What Are the Most Common Freight Classes?

60, 70, 85, 92.5, and 100 are some of the most common freight classes we see. To give you a deeper understanding of freight classes—and the commodities that fall into them—take a look at the chart below::

Class Density Range (Pounds Per Cubic Foot) Example Commodity
50 >50 Bricks, sand, nuts, bolts
55 35 – 50 Cement, mortar, hardwood flooring
60 30 – 35 Car parts and accessories, crated machinery, glue, bottled water
65 22.5 – 30 Bottled beverages, books in boxes
70 15 – 22.5 Food items, car parts, and accessories, automobile engines
77.5 13.5 – 15 Tires, bathroom fixtures
85 12 – 13.5 Automobile engines, cast iron stoves, crated machinery
92.5 10.5 – 12  Computers, monitors, refrigerators, ice machines
100 9 – 10.5 Calculators, wine cases, canvas
110 8 -9 Cabinets, frames artwork
125 7 – 8 Small household appliances
150 6 – 7 Bookcases, wooden desks
175 5 – 6 Clothing, glass, china
200 4 – 5 Packaged mattresses, aircraft parts
250 3 – 4 Flat-screen TV’s, molded auto parts
300 2 – 3 Wooden tables and cabinets, kayaks
400 1 – 2 Deer antlers, light fixtures
500 <1 Ping pong balls, gold flakes

As you look through these examples, you’ll notice that a wide variety of different commodities can fit within the same freight class. This is why it’s important to work with an expert to help you find the right freight class for your commodity.

The other piece of information that can help you determine your commodity’s freight class is its NMFC® code.

What’s an NMFC Code?

The National Motor Freight Classification® is a set of standards created by the NMFTA to classify freight. Each commodity has its own NMFC code, which can be used to help determine its freight class.

Updates to the NMFC System: What Shippers Need to Know

On July 19, 2025, the NMFTA overhauled the NMFC system. These changes have the potential to impact shipping costs. Talk to your freight forwarder or LTL carrier to discuss whether modifications to your packaging—such as improving stowability—could help you optimize your freight costs.

Below, you’ll find a list of the major changes for your reference:

  • The NMFTA replaced the 11-sub full density scale with a more detailed 13-sub density scale to improve classification accuracy.
  • 2,000+ items were moved to full-scale density-based classification. In other words, only the density of these items will determine the freight’s classification.
  • Items with unique handling, stowability, and liability considerations have been more clearly marked.
  • All lookup information has been condensed to the NMFTA’s ClassIT+ online tool.

More information on the changes is available on the NMFTA website. Your forwarder or carrier can answer questions specific to the commodities you’re shipping.

 

What's the Difference Between Freight Class and an NMFC Code?

An item’s freight class will tell you which one of the 18 standard classes your shipment belongs to. However, the NMFC code is a designation specific to the commodity itself. Every NMFC code is matched up with a freight class. So if you know the NMFC code for the items you’re shipping, it can help you figure out the freight class for your commodity.

For example, a hair dryer has an NMFC code of 62180, which falls into a freight class of 125. Wheel covers in packages with a density in pounds per cubic foot of 6 but less than 8 are also in the same freight class: 125. Their NMFC code is 18260-A Sub 5.

If you already know the NMFC code for the commodity you’re shipping, a 3PL or freight forwarder or a carrier can look up your freight class for you.

If you don’t know the NMFC code, consider reaching out to the manufacturer of the goods you’re shipping. They often know the NMFC code and freight classification of the items they manufacture, which can help you get a quick answer.

Can You Calculate Your Freight Class on Your Own?

Yes. However, while you can often use the NMFC code—or an online calculator—to figure out your freight class on your own, it can be risky. If you get it wrong, your shipment will have to be re-classed, which often comes with extra charges. Your best bet is to talk to a 3PL or a freight forwarder to make sure you have the right freight class.

We’d be happy to assist you! Contact us and we can help you get started with classing your freight—the right way. Additionally, if you’re shipping via ocean freight, we also offer FAK (freight of all kinds) rates! By using this type of classification, you can save yourself some significant time when shipping LCL (less than container load) freight.

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