Freight Class Calculator — NMFC Freight Classification
Calculate NMFC freight class from shipment density. Used for LTL freight quotes and shipping labels.
Cubic Feet
40.00
Density (lb/ft³)
5.00
Freight Class
175
Formula
**Freight Class Formula (NMFC density-based)**
Cubic Feet = (L × W × H) ÷ 1,728
Density (lb/ft³) = Weight ÷ Cubic Feet
Class lookup: ≥50→50 | ≥35→55 | ≥30→60 | ≥22.5→65 | ≥15→70 | ≥13.5→77.5
≥12→85 | ≥10.5→92.5 | ≥9→100 | ... | <1→500
Worked Example
**Example:** 200 lb pallet, 48"×40"×36"
Cubic Feet = (48×40×36) ÷ 1,728 = 40 ft³
Density = 200 ÷ 40 = **5.0 lb/ft³** → **Class 175**
Frequently Asked Questions
What is NMFC freight class?
The National Motor Freight Classification assigns freight to 18 classes (50-500). Lower class = denser freight = cheaper to ship.
Is density the only factor?
For most commodities, yes. Some items have a fixed NMFC class assigned regardless of density (certain food products, hazmat).
Does this include the pallet weight?
No. Add the pallet weight (typically 30-50 lb for wood pallets) to your freight weight for accurate class determination.