Freight Class Calculator
Calculate the National Motor Freight Classification (NMFC) class for your LTL shipments. Freight class affects pricing for less-than-truckload domestic shipping.
Freight Class Calculator
Estimate the NMFC density class for an LTL shipment
Unit System
Dimensions per Handling Unit
Density scale used
| Density (lb/ft³) | Class |
|---|---|
| 50 or more | 50 |
| 35 to less than 50 | 55 |
| 30 to less than 35 | 60 |
| 22.5 to less than 30 | 65 |
| 15 to less than 22.5 | 70 |
| 12 to less than 15 | 85 |
| 10 to less than 12 | 92.5 |
| 8 to less than 10 | 100 |
| 6 to less than 8 | 125 |
| 4 to less than 6 | 150 |
| 2 to less than 4 | 250 |
| 1 to less than 2 | 300 |
| Less than 1 | 400 |
Based on the NMFC density scale. Some commodities have their own class regardless of density, so your carrier may assign a different class. Use this as an estimate.
How to Use This Tool
1
Enter Shipment Details
Input the dimensions and weight of each handling unit, and how many there are.
2
Review Classification
See the density and the estimated density-based freight class.
3
Get Shipping Estimate
Use the class for accurate LTL quotes.
Frequently Asked Questions
What is freight class?
Freight class is a standardized classification system (NMFC) used by LTL carriers to determine pricing. Classes range from 50 to 500, with lower classes typically being less expensive to ship.
How is freight class determined?
Freight class is based on density (weight per cubic foot), stowability, handling requirements, and liability. Density is the primary factor for most commodities.
What happens if I use the wrong freight class?
Carriers may re-weigh and re-classify shipments. Using an incorrect class can result in additional fees or billing adjustments. Accurate classification upfront avoids surprises.