Freight Class Calculator
The Freight Class Calculator determines the correct NMFC (National Motor Freight Classification) freight class for your shipment based on its density (weight per cubic foot). Freight class is a standardized system used by LTL (Less-than-Truckload) carriers to price shipments. Classes range from 50 (densest, cheapest) to 500 (least dense, most expensive).
Freight Class Calculator
Calculate NMFC freight class from shipment dimensions and weight
Examples
Auto Parts Shipment
A pallet of auto parts weighing 500 lbs, measuring 48×40×28 inches. Volume = 30.77 cu ft. Density = 16.25 pcf → Freight Class 70.
Furniture Shipment
A sofa weighing 200 lbs in a 72×36×40 inch box. Volume = 60 cu ft. Density = 3.33 pcf → Freight Class 250.
Frequently Asked Questions
What is freight class?
Freight class is a standardized classification system (NMFC) used by LTL carriers to determine shipping rates. Classes range from 50 to 500, with lower numbers indicating denser, heavier items that cost less to ship per pound.
How is freight class calculated?
Freight class is primarily determined by density (pounds per cubic foot). Other factors include stowability, handling difficulty, and liability. Density-based classification is the most common method.
What is the formula for freight density?
Density = Weight (lbs) ÷ Volume (cubic feet). Volume in cubic feet = (Length × Width × Height in inches) ÷ 1,728.
What freight class is best?
A lower freight class (like 50 or 55) means lower shipping rates per pound. Higher freight classes (250, 300, 400, 500) are typically assigned to low-density, bulky items and carry higher per-pound rates.