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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.

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