A Freight Class Calculator is a tool that helps shippers find the correct freight class for their goods. In LTL (Less Than Truckload) shipping, every shipment is given a freight class. This class is used by carriers to decide shipping rates. Freight class is mainly based on four factors: density, stowability, handling, and liability. Out of these, density is the most important factor. Density means how heavy the shipment is compared to its size. A Freight Class Calculator usually asks you for weight, length, width, and height. Then it calculates density and shows the correct freight class.. https://freight-classcalculator.