What is NMFC?

Reviewed October 25, 2026. Definitions and update guidance come from NMFTA’s current NMFC resource.

What the standard considers

NMFTA identifies four characteristics: density, handling, stowability and liability. Density describes weight relative to space; the other characteristics concern how freight is handled, fits with other freight and presents transportation risk. The applicable item provisions determine how those characteristics affect classification.

Those provisions matter in less-than-truckload shipping, where different shippers’ freight shares a network. To identify the applicable item, start with what the goods are and how they are prepared. Weight and dimensions alone cannot supply a commodity description.

For a step-by-step search process, use the NMFC code lookup guide. This page explains the standard and terminology; the lookup guide explains the information to collect and where to confirm it.

How density fits into the result

The 13-tier density chart used on this site is a public reference from the 2025 changes. If the shipment is governed by that scale, its calculated density maps to one of those bands. The chart does not establish which item applies.

Consider two hypothetical packing designs for the same goods, each weighing 900 lb after packing. Assume both designs are suitable for the goods; this arithmetic does not establish their suitability.

The goods have not changed, but the occupied space has. That changes density and the estimate on this scale. It does not prove a different commodity item applies or guarantee a lower carrier quote. Keep required protection in place and confirm the finished package; see the pallet preparation guide.

Try the freight class calculator with your measurements, or use the density calculator when you need the weight-to-volume result.

Where current NMFC information lives

NMFTA identifies ClassIT+ as the official digital source for item changes, density scales and rule updates. Its public guidance also points to published docket proposals and final actions. A proposal and an effective provision are not interchangeable; use the current information applicable to your shipment.

NMFTA describes classification as an evolving standard. A saved item, old bill of lading or dated chart therefore needs context. Check that the description and packaging still match, and confirm changes before carrying an old entry into a new shipment.

This website publishes a dated density estimator, not live NMFC item data. It does not search or reproduce the licensed commodity database. If classification is unclear, NMFTA’s interpretations guidance asks for photographs, dimensions, construction details and typical packaging.

What to put on the shipment record

XPO’s NMFC guidance asks for accurate commodity description, item and sub, class or density, and weight. Keep those details connected to the actual load and the confirmation you received.

Also confirm the journey and service needs. Class is one factor in a quote; origin, destination and additional services still matter. If a later inspection changes the billed classification, use the supporting records to investigate through the carrier’s process. The reclassification guide explains that next step.