Freight class calculator

Calculate packaged freight density and the corresponding class on the NMFTA 13-sub density scale.

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Packaged weight (pounds)

Maximum packaged length (inches)

More inputs and assumptions

Maximum packaged width (inches)

Maximum packaged height (inches)

Answer

…

Calculate packaged freight density and the corresponding class on the NMFTA 13-sub density scale.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

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Formula and assumptions

Uses the published 2025-1 density scale, including classes 60 at 30-35, 55 at 35-50, and 50 at 50 or more pounds per cubic foot. Dimensions must include the pallet, packaging and overhang. This does not look up an NMFC commodity item or determine handling, liability, stowability or carrier exceptions. Confirm the current item uses this scale; some items have fixed classes or different breaks. One package or handling unit per calculation.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-29

Using Freight class calculator

Calculate packaged freight density and the corresponding class on the NMFTA 13-sub density scale.

Next: Dimensional weight calculator

Next: Volume calculator

A worked example

For packaged weight (pounds) = 450, maximum packaged length (inches) = 48, maximum packaged width (inches) = 40, maximum packaged height (inches) = 45, density-scale freight class = 100.

Before you use the result

Example results for packaged weight (pounds)

These examples use Maximum packaged length (inches): 48; Maximum packaged width (inches): 40; Maximum packaged height (inches): 45. They are reference calculations, not recommended settings.

Packaged weight (pounds)	Density-scale freight class
225	175
450	100
900	70

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