Freight Density Formula:
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Definition: This calculator determines the density of freight in pounds per cubic foot (lb/ft³) based on the shipment's weight and dimensions.
Purpose: It helps shippers and carriers classify freight, determine shipping costs, and ensure proper handling of shipments.
The calculator uses the formula:
Where:
Explanation: The formula converts cubic inches to cubic feet (1728 cubic inches = 1 cubic foot) then divides weight by volume to get density.
Details: Freight density affects shipping rates, carrier selection, and packaging requirements. Higher density freight typically costs less per pound to ship.
Tips: Enter the shipment's weight in pounds and all dimensions in inches. Measure to the farthest points including packaging.
Q1: Why is 1728 used in the formula?
A: There are 1728 cubic inches in a cubic foot (12×12×12), which converts the volume from cubic inches to cubic feet.
Q2: What's considered high density freight?
A: Typically over 15 lb/ft³, though this varies by carrier. High density freight often qualifies for lower rates.
Q3: Should I include packaging in measurements?
A: Yes, always measure the entire shipment including all packaging materials.
Q4: How accurate should my measurements be?
A: Round to the nearest inch for most shipments, but measure precisely for high-value or irregular items.
Q5: Does this work for irregularly shaped items?
A: Yes, but you must measure the maximum length, width, and height of the entire packaged shipment.