Which one you want
The first two tools answer the two directions of one question. If you have dimensions and a weight and want the class, use the freight class calculator; if what you need is the density figure itself — for a rate quote, a warehouse form, or a carrier portal that asks for pounds per cubic foot — use the freight density calculator. Both take the same four numbers, so moving between them costs nothing.
The pallet loading calculator answers a different question: how many cartons fit. Give it the carton size and weight, the pallet, and the maximum loaded height you are allowed, and it works out the carton count first. Density and class come back with it as by-products of the load it found.
What all three have in common
They read one file: the 13-subprovision density scale published under NMFC Docket 2025-1. Every page that shows a class value also shows the docket version, the date the data was last verified, and a link to the primary source, so a figure you take from here can be checked against the document it came from.
None of them ask you to sign up, and none of them store what you type. Each one names the document its figures come from and the date that data was last checked.
Frequently asked
Which tool should I open for a rate quote?
The freight density calculator, unless the quote form asks for the class directly. Density is the figure an LTL rate is built from, and it is the one you can check yourself with a tape measure and a scale.
Why is the pallet calculator on a separate page?
Because it answers a different question with different inputs. Folding it into the class calculator would mean a form where half the fields do not apply to what you are trying to find out.
Are these tools the same as my carrier's calculator?
The arithmetic is the same density arithmetic. The result is an estimate of the density question under NMFC Item (Rule) 170, not a classification decision: handling, stowability, and liability characteristics can move a shipment to another class, and your carrier makes the final call.