Disclaimer
The class this site reports is a density-based estimate for one specific question: which density band a shipment falls into, and therefore which class the published density scale assigns to that band. It is not a classification decision and it is not advice about your shipment. This page sets out plainly what is and is not being claimed, because knowing the limits of a tool is part of using it correctly.
What this site does not decide
The density scale applies only to freight without unusual handling, stowability, or liability characteristics. A shipment that is fragile, oddly shaped, hazardous, perishable, or difficult to stow is classified on those characteristics instead, and no density figure changes that. Density classification is also subject to NMFC Item (Rule) 170.
A class is an input to a price, not a price. Rates, accessorials, minimum charges, and discounts are set by a carrier's tariff and by the agreement you have with that carrier. Nothing on this site estimates what a shipment will cost.
Nothing here is legal, customs, tax, or trade-compliance advice, and nothing here is a substitute for the NMFC itself or for a carrier's own determination.
Accuracy, and its limits
The class values and density bands published here are taken from NMFTA's own publication of the Docket 2025-1 changes, with the source and the date of the last check shown on every page that displays a class. The scale is versioned, so a figure is always attached to the version it came from.
Even so, the site is provided as is, without warranty of any kind. Automated checks catch structural corruption and every published value is pinned by a test, but no test proves that a future revision of the scale has been incorporated. If a number here disagrees with NMFTA's current publication, the publication is correct and this site is wrong, and we would like to hear about it through the corrections page.
Densio is not affiliated with, endorsed by, or in partnership with NMFTA or any carrier. Sources are named because they are the authority on the data, not because there is a relationship.
Frequently asked
Can I use this class value on a bill of lading?
The class value is the published value for a density band, so it can be cited, but a bill of lading carries a classification decision that this site does not make. Keep the docket version and effective date next to the number, and expect the carrier to make the final call.
What if my shipment has special handling requirements?
Then density is not the governing characteristic and this tool's answer does not apply. Freight that is fragile, hazardous, perishable, or hard to stow is classified on those characteristics, and the appropriate source is the NMFC entry for the commodity together with your carrier.
Do you guarantee the values are current?
No, and you should not read the verification date as a guarantee. It records when the data was last checked against the primary source. NMFTA has already signalled further changes to the scale, so check the version attached to any figure you rely on.
Data source verified:
Primary source: NMFTA Disposition Bulletin 1371 — density and class breaks for the 13-subprovision structure
Archived copy: snapshot 0, snapshot 1