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Freight guides

What freight class is this?

Start with the commodity and current NMFC item. Measure the packed freight; density alone is not a freight-class decision.

The short answer

You cannot reliably assign freight class from “one pallet,” a photo, or weight alone. For an NMFC-rated shipment, identify the actual commodity and applicable current item, then check its packaging and classification provisions. NMFTA describes four factors: density, handling, stowability and liability. A lower density or an awkward shape can matter, but the item’s rules decide how. NMFTA’s classification overview.

What to give your carrier or broker

  1. Describe the actual article, material and condition. “Used automotive transmission” is more useful than “parts.”
  2. Give each finished handling unit’s greatest length, width and height, including the pallet, crate and projections.
  3. Supply the full packed weight, not only the product weight.
  4. Explain packaging, whether anything can be stacked on top, and any special handling.
  5. Ask for the applicable NMFC item/sub-item and class used in the quote, and retain that answer with the shipment details.

Different commodities on one pallet need a specific classification review. Do not assume one density result settles every item. NMFTA advises reviewing both the current commodity provisions and minimum packaging requirements. NMFC fundamentals.

Calculate density, without guessing the class

In inches and pounds: cubic feet = length × width × height ÷ 1,728. Density = packed weight ÷ cubic feet. Include the handling base. Our calculator reports that measurement only. NMFTA’s density method.

Example: 48 × 40 × 48 inches at 500 lb = 9.38 lb/ft³ (53.33 ft³).

One handling unit at a time. This does not assign or certify a freight class.

Why an old chart is not enough

NMFTA’s 2025 changes expanded its standard density scale to 13 subprovisions for relevant commodities. That does not mean every article uses the same scale or that all handling and liability considerations disappeared. An old saved class can be wrong after an item or its packing changes. Check the current item rather than choosing the lowest number a chart offers. NMFTA’s change explanation.

Is freight class the same as an HS code?

No. Ask your broker or carrier which classification is required for this quote and separately which customs information is needed for an international shipment. Do not substitute a freight-class number for customs documentation. CBSA explains customs tariff classification.

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Sources checked 26 October 2026. Requirements can change; confirm the shipment with the provider before tendering it.