The density calculator provides an estimated class based strictly on the density of the freight as provided by its dimensions and weight using the NMFTA's 13 tier density chart. Actual freight classification is based on multiple factors including density, stowability, handling, and liability. Dayton Freight Lines, Inc. utilizes the NMFC (National Motor Freight Classification) to arrive at the proper freight class and this will supersede any classification estimated strictly on density as provided above. Please visit the NMFTA at https://nmfta.org/nmfc/ for information on proper freight classification.