About Densio
Densio is an independent reference for the density-to-class relationship used in United States LTL freight. It is run as a small publishing project rather than a company with a sales team, and it earns nothing from any carrier, broker, or 3PL named on the site. This page explains why the site exists, how it is run, and the two things it deliberately refuses to do.
Why this site exists
The density scale is short, published, and decides a large share of what a shipment costs. It is also easy to get wrong, because NMFTA publishes a second density table that looks similar, covers a different class range, and disagrees with the first in several bands. Most of the work behind this site is not presenting the table; it is being sure which table it is.
The other reason is narrower. Carriers and brokers publish density tools, and those tools are good, but they answer with one carrier's rules because that is what they are for. A shipper comparing quotes has no reason to prefer any of them. This site takes the same published scale and answers without routing you anywhere, which is a smaller ambition but a different one.
How it is run
Every figure on this site comes from a document you can open, and each data file carries the date it was last checked against that source. The scale is versioned rather than edited in place, and a change to it produces a public record of what changed and when. Where a former value was never captured, the record says so instead of being filled in.
The site also states plainly what it is not. There is no freight professional behind it, no industry tenure to point at, and no affiliation with NMFTA or any carrier. That is written on the methodology page as a limitation rather than left for you to discover, because a reference you cannot check is worth less than one you can.
Frequently asked
Who is behind Densio?
The site is published under the organisation name Densio. It is not staffed by licensed customs brokers or practising classification specialists, and no individual byline is used, because inventing an expert persona would be worse than having none.
How does the site make money?
Advertising, and nothing else. There are no affiliate links, no sponsored placements, and no lead forms. No carrier can pay to appear here, which is what keeps the answer to a given input from depending on who is asking.
Why no user accounts or saved shipments?
Because the calculator runs entirely in your browser and nothing you enter is sent to this site. Saving shipments would mean storing them, and storing them would mean this site became a database of other people's freight — with everything that follows from that.
Data source verified:
Primary source: NMFTA Disposition Bulletin 1371 — density and class breaks for the 13-subprovision structure
Archived copy: snapshot 0, snapshot 1