Determine Freight Class
Freight density helps estimate class, while the final class follows applicable NMFC rules.
Formula: Density = weight(lb) ÷ volume(ft³); class also depends on commodity and handling.
Use figures from the same reporting period and apply the definition used by the calculator. Ratios and percentages are most useful when the underlying accounting or advertising figures are comparable.
Recalculate the ratio or percentage from the displayed figures and confirm that the same reporting period and definitions were used.