Freight Class Calculator
Get the class right, avoid reclass fees.
LTL freight class (50–500) is largely driven by density. Enter the dimensions and weight of the shipping unit to estimate its class using the NMFC density scale.
Estimated freight class
Class 92.5
Density
11.25 lbs/ft³
Volume
53.33 ft³
How to Use It
- Measure the full shipping unit including the pallet, at its longest points.
- Weigh the unit including packaging and pallet.
- Read the estimated class — denser freight gets a lower class and cheaper rate.
- Confirm with the commodity's NMFC item; some goods are classed by commodity, not density.
The Formula
Volume (ft³) = L × W × H (inches) ÷ 1,728 | Density = Weight ÷ Volume | Class from NMFC density table
Frequently Asked Questions
How is freight class calculated?
Divide length × width × height in inches by 1,728 to get cubic feet, then divide weight by cubic feet for density. The density maps to a class from 50 (densest) to 500.
Why does freight class matter?
Class sets the LTL rate. A higher class means a higher rate per hundredweight, and a wrong class can trigger reclass fees.
Is freight class used for truckload?
No — freight class applies to LTL shipments. Full truckload freight is priced by lane, miles, and market conditions.
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Results are estimates for planning only and are not tax, legal, or financial advice.