US LTL freight · Dimensions, weight and handling units
Density Calculator Freight
Calculate freight density in pounds per cubic foot for one pallet or a batch of identical handling units. Check your units and weight basis before using the result.
NMFTA sources read
1. Check units and packed measurements
A handling unit is one pallet, crate or package offered to the carrier, not the boxes inside a pallet.
Changing the dimension unit clears the dimensions to prevent reinterpreting the same numbers. Weight is always in pounds, never kilograms.
2. Freight density result
Select inches or feet and whether the weight is per unit or total.
Before determining freight class
Density is not an NMFC item lookup. Check the current item and its provisions before using a freight class.
Review density-based classification checks or verify the item in NMFTA ClassIT+.
This calculator does not assign a freight class, NMFC code, carrier rate or shipping price. Different sizes or weights need separate calculations.
How to calculate freight density
NMFTA's method divides gross pounds by cubic feet. Measure the greatest outside dimensions, including projections and packaging, as offered for shipment. For inches: length × width × height ÷ 1,728 = ft³.
NMFTA's example is 48 × 40 × 45 inches and 450 lb: 86,400 ÷ 1,728 = 50 ft³; 450 ÷ 50 = 9 lb/ft³.
Our identical-unit extension multiplies volume and per-unit weight by quantity. If you enter total pounds instead, it divides that weight by quantity first. This is arithmetic for identical units, not a rule for combining different freight.
Freight density questions
Why must I check inches versus feet?
Entering feet as inches changes calculated volume by a factor of 1,728. This tool clears dimensions when you change units, then asks you to confirm the measurements. It accepts pounds only.
Does quantity change the density?
With identical units and per-unit weight, quantity increases total volume and weight equally, so density stays the same. With a fixed total weight, increasing quantity lowers the calculated weight per unit. Check which weight you entered.
Can I use one average for different pallets?
This tool requires identical dimensions and gross weight when quantity exceeds one. For different pallets, run each handling unit separately. Boxes secured together on one pallet count as one handling unit here.
Is freight density the same as freight class?
No. NMFTA's classification FAQ says the correct item matters; handling, stowability and liability can prevent an item from using full-density classification. This calculator provides no item code or class. Use the result to check the applicable provisions, not as a final classification.
Is this a Saia or DHL freight calculator?
This is an independent ShipCost Lab calculator. It does not connect to carrier systems or quote transport charges.
Primary sources and dates
NMFTA's update cadence is unknown. Our review interval is 30 days. Unpublished adjustments, special item provisions and carrier tariffs are outside this calculation.