Freight density describes how much weight is packed into a given amount of space. In U.S. LTL workflows it is commonly expressed in pounds per cubic foot (lb/ft³).
Density formula
First calculate the total cubic feet of the handling unit, then divide total shipment weight in pounds by that volume.
Density = shipment weight (lb) ÷ shipment volume (ft³)
The Freight Density Calculator handles metric or imperial inputs and displays both U.S. and metric density.
Measure the whole handling unit
For palletized freight, include the pallet and packaging in the greatest outside dimensions. If freight overhangs the pallet or cannot be safely stacked, the effective space it consumes can be greater than the product footprint alone.
Density and freight class are related, but not identical
Density can be an important classification input, but an official classification may also depend on commodity-specific provisions, handling, stowability, liability and carrier tariff rules. A density-based class estimate is therefore a planning aid rather than an official classification.
Use the Freight Class Calculator to understand the density-based estimate, then verify any shipment where classification affects the quote or contract.
Why density matters operationally
Two pallets can occupy the same floor space while having very different weights. Density helps explain that difference and gives shippers a consistent way to compare weight to cube.
Before using the number
- Include pallet and packaging dimensions.
- Use the shipment weight, not product-only weight.
- Measure the greatest outside dimensions.
- Check whether the freight is stackable.
- Verify the applicable classification or tariff before tender.
Good density inputs reduce preventable quoting surprises, but they should stay connected to the real physical handling unit.