Find your freight class in seconds
Free freight class, density and shipping calculators, using the 13-tier NMFC density scale in effect since July 2025.
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The freight class density scale
Since July 19, 2025 (NMFC Docket 2025-1), most freight without special handling is classed by density on these 13 tiers. Heavier for its size means a lower class and a lower rate. The carrier assigns the final class.
| Density (lb per cu ft) | Estimated class |
|---|---|
| Less than 1 | 400 |
| 1 to under 2 | 300 |
| 2 to under 4 | 250 |
| 4 to under 6 | 175 |
| 6 to under 8 | 125 |
| 8 to under 10 | 100 |
| 10 to under 12 | 92.5 |
| 12 to under 15 | 85 |
| 15 to under 22.5 | 70 |
| 22.5 to under 30 | 65 |
| 30 to under 35 | 60 |
| 35 to under 50 | 55 |
| 50 or more | 50 |
Common questions
How do I calculate freight density?
Multiply length × width × height in inches and divide by 1,728 to get cubic feet. Then divide the weight in pounds by the cubic feet. A 48 × 40 × 48 in pallet weighing 500 lb is 53.33 cubic feet and 9.38 lb per cubic foot.
What freight class is 9 pounds per cubic foot?
Class 100. On the 13-tier NMFC density scale in effect since July 19, 2025, 8 to under 10 pounds per cubic foot is class 100.
Should I measure the pallet too?
Yes. Measure the shipment as it will ship, including the pallet and any overhang, and include the pallet’s weight.
Is this the class my carrier will bill?
It is an estimate. The carrier may reweigh, remeasure or apply an item-specific NMFC class, and that is the class you are billed at.