Freight Class Examples
Class 125 for 500 lb at 48x40x72 in
Class 125 is the density-based estimate for 500 lb at 48 x 40 x 72 inches because the complete handling unit calculates to 6.25 pounds per cubic foot.
Full density and class calculation
The outside envelope contains 48 x 40 x 72 = 138,240 cubic inches. Dividing by 1,728 converts that envelope to 80.00 cubic feet. Dividing the gross packaged weight of 500 pounds by 80.00 cubic feet gives 6.25 pcf. The current density table places 6.25 pcf in the 6 to under 8 pcf band, which produces the class 125 screening result shown above.
48 x 40 x 72 / 1,728 = 80.00 ft3; 500 / 80.00 = 6.25 pcf; density estimate = class 125.
Nearest freight class boundaries
At this exact footprint and height, the lower edge of the current band corresponds to 480.0 pounds. A decrease of about 20.0 pounds would reach that edge and can move the density estimate toward the next higher class number. The upper edge corresponds to 640.0 pounds. An increase of about 140.0 pounds would reach the higher-density edge and can move the estimate toward the next lower class number.
The same boundaries can be expressed as height changes while holding 500 pounds and the 48 x 40 inch footprint constant. A packaged height near 56.3 inches reaches 8 pcf, while a height near 75.0 inches reaches 6 pcf. Decreasing height raises density; increasing height lowers density. Measure the final wrapped load rather than choosing a favorable nominal carton height.
| Boundary | Weight at current size | Height at current weight |
|---|---|---|
| 6 pcf | 480.0 lb | 75.0 in |
| 8 pcf | 640.0 lb | 56.3 in |
What changes the answer
If the entered 72 inch height omitted a 5.6 inch pallet base, including that base would produce 5.80 pcf and a density estimate of class 175. Two inches of combined length and width overhang would produce 5.71 pcf and class 175. Two additional inches of shrink wrap, corner board, or top projection would produce 6.08 pcf and class 125. These comparisons show why the greatest tendered dimensions control the arithmetic.
How stable is this estimate?
This combination sits close to the lower-density edge of its band. Small measurement or scale differences can therefore change the density-based class estimate. Recheck pallet overhang, wrap, projections, gross pallet weight, and carrier inspection measurements before using class 125 for planning.
Decision profile for this exact load
The 48 x 40 inch footprint matches a common North American pallet plan, so final wrapped height is the dimension most likely to be omitted from a nominal pallet description. 2 of the three packaging corrections tested on this page changes the density-based class result. The closest band edge is 0.25 pcf from the calculated density, and the load sits 12.5% of the way from the 6 pcf edge to the 8 pcf edge.
Four-factor NMFC caveat
NMFC classification is not determined by density alone. The four transportation characteristics are density, stowability, handling, and liability. A commodity item, packaging rule, unusual handling need, poor stowability, or liability characteristic can override this density-only estimate and lead to a different official class.
Use the current NMFTA ClassIT+ record or qualified classification guidance to confirm the governing item and rules. Freight Totals is independent of NMFTA and carriers, and this page is a planning calculation rather than an official classification or rate.
Sources
- NMFTA: NMFC 13-Sub Density and Class BreaksSource record 2026-08-13. Density-based NMFC provisions only
- NMFTA: How is the density of a handling unit calculated?Source record 2026-08-12. LTL handling-unit measurement