FedEx Freight Class Calculator
Find the density and freight class of a FedEx Freight LTL shipment in seconds. This is an independent calculator, not a FedEx tool. Below it are the rules from FedEx Freight's own tariff that change what light, bulky and no-stack freight costs.
Density-based estimate. Some commodities carry a fixed NMFC class — check our freight class by commodity pages.
Estimated Freight Class
Density
6.56
lb/ft³
Volume
53.33
ft³
Weight
350
lb
6–8 lb/ft³ → Class 125
NMFC density scale (Docket 2025-1, effective July 19, 2025)
Pre-July-2025 table: class 150. Use it only if your carrier contract still prices on the old table.
Free PDF includes a watermark. Pro removes it & adds your brand.
Estimates only — verify freight class/NMFC and chargeable weight with your carrier.
Uses the 13-tier NMFC density scale (Docket 2025-1). See the full freight class chart.
How FedEx Freight prices your pallet
FedEx Freight sells two LTL services, Priority and Economy, and both are rated from freight class, weight and lane. Its rules tariff (100-Y, effective January 5, 2026) adds limits for freight that is light for its size. FedEx parcel services work differently: they bill on dimensional weight. So a box needs a DIM weight, while a pallet needs a freight class.
FedEx Freight's cubic capacity rule (Item 613)
A shipment over 750 cubic feet with an average density under 4 lb/ft³ gets a minimum charge. FedEx multiplies the cubic feet by 6 lb to get a billing weight and rates it at class 150, for Priority or Economy. It then takes off 50% or your own discount, whichever is bigger.
Example: 9 pallets, each 48 × 40 × 70 inches, 2,700 lb in total. As built they take 700 cubic feet, so the rule does not apply. Mark them “do not stack” and FedEx counts each one at 84 inches high: 840 cubic feet at 3.2 lb/ft³. Now the floor is 5,040 lb at the class 150 rate. Pallets that can take freight on top are counted at their real height, so the rule would not apply.
When FedEx Freight bills a capacity load
FedEx Freight's Item 390 treats freight as a capacity load when it uses 15 or more linear feet of a trailer and is at least 5 feet wide, or when it weighs more than 15,000 lb. For the cubic capacity rule, unitized loads longer than 14 linear feet are measured as one block. For loads this long, ask for a volume quote as well as an LTL rate.
The FedEx Freight Box: when class does not matter
For some shipments FedEx offers the FedEx Freight Box: one flat rate for whatever fits in the box, up to 1,200 lb, with no freight class. It comes in two sizes, one with a built-in pallet, and it does not serve Alaska, Hawaii, Puerto Rico, Canada or Mexico. Because the price does not rise with weight, it tends to pay off for heavy, dense freight. For light freight, compare it with a class-based quote.
FedEx Freight Class Calculator
FedEx Freight publishes its own class calculator on fedexfreight.com, and it runs the same density math as the tool above. Use either one, then check the Item 613 and no-stack rules on this page before you book light freight.
Frequently asked questions
How do I find my freight class for FedEx Freight?
Measure the pallet's length, width and height in inches, with the pallet included, and weigh it. Divide the weight by the cubic feet to get density, then match it to the NMFC scale. The calculator above does both steps.
What is the FedEx Freight cubic capacity rule?
Item 613 of the FedEx Freight rules tariff: shipments over 750 cubic feet that average under 4 lb/ft³ are billed at least as 6 lb per cubic foot at class 150, less 50% or your discount, whichever is greater.
What's the difference between FedEx Freight Priority and Economy?
Priority is the faster LTL service; Economy trades speed for a lower rate. Both are priced from the same freight class, weight and lane.
Does FedEx bill on dimensional weight or freight class?
Both, by service. FedEx Express and Ground parcels bill on dimensional weight. FedEx Freight LTL bills on NMFC freight class, so a pallet needs its class and a box needs its DIM weight.