Freight Class Calculator

Quickly calculate your freight class and freight density.

How does it work?

Simply measure the weight (in pounds), and the length, width, and height (in inches) of your freight. Then enter those measurements into the fields below.

Why is this important?

Commonly, a shipment with lower density (measured in pounds per cubic feet (PCF)) has a higher freight class. The higher the freight class, the more expensive shipping is.


The Calculator
Weight (lbs)
Length (in)
Width (in)
Height (in)





What is Freight Density?

Freight density is the space your product occupies in relation to its weight. You determine this by dividing the weight of your product in pounds by its volume in cubic feet. The volume in cubic feet is determined by:

  • length * width * height / 1,728 (the number of cubic inches in a cubic foot)

Note: the calculator above is also a density calculator. It performs the density calculation along with the freight class calculation.


How is Freight Shipping Class Determined?

The lowest cost freight class (50) fits on a standard shrink-wrapped 4X4 pallet, and is very durable. In order to determine your product's freight classification, the four factors below are used:

1. Commodity and Density

You first need to find out if your product is density-based. You do this by identifying which National Motor Freight Traffic Association (NMFTA) National Motor Freight Classification (NMFC) code corresponds to your product. You need to figure out:

  • What your product is made of.
  • What your product is used for.
  • How your product will be loaded and handled.
  • How your product will be packaged.

Some commodities are not density-based and have pre-determined freight classes. However, other commodities are density-based. If your product is density-based, the freight class calculator above will be useful.

2. Stowability

If your product is difficult to store (for example, it's hazardous or extremely heavy), it'll be assigned a higher freight class.

3. Handling

Since your product will likely pass through various checkpoints and facilities on route to its final destination, it's ideal if it's properly packed and easy to handle. Therefore, if it's fragile, oddly-shaped, very heavy, or hazardous it'll be more difficult to handle, so it may be categorized in a higher freight class.

4. Liability

If your product is perishable or easily-damaged, it will likely be designated a higher freight class.


What is Less Than Truckload freight shipping (LTL)?

LTL freight shipping is used for transporting smaller commodities, or when an entire trailer isn't required. The total weight limit for this shipping method is between 150 - 15,000 pounds. A shipper using LTL will share spare in a trailer with other shippers.


How about a Freight Class Chart?

Density Examples of Products Freight Class
50Bricks, flour, gravel.50
35Cement, hardwood flooring, mortar.55
30Machinery, books, crayons.60
22Tile, bottles, books.65
15Engines, food, metal castings.70
13Clothing, tires, household fixtures.77.5
12Bales, packaged food. cloth fibre.85
10Refrigerators, computers, electric shavers.92.5
9Caskets, household goods, wine cases.100
8Cabinets, table saws, framed artwork.110
7Small appliances, wooden furniture, kitchen equipment.125
6Computers, clothing, sheet metal.150
5Couches, fish tanks, aquariums.175
4Mattresses, optical lenses, furniture.200
3Televisions, bamboo furniture, computers.250
2Chairs, tables, stuffed animals.300
1Popcorn, chips, antlers.400
<1Ping pong balls, rare antiques, gold bars.500
Found this useful? Give it a share!