Freight cube is the total cubic space occupied by a shipment. When you also enter weight, FreightToolset calculates density in pounds per cubic foot.
Cubic feet = length (in) × width (in) × height (in) ÷ 1,728 × quantityWhy cubic feet matters in freight
Trailer and warehouse capacity are limited by cube as well as weight. Cubic feet helps estimate the space required by cartons, pallets and crated freight, and it is the denominator used when calculating LTL density.
Convert inches to cubic feet
There are 1,728 cubic inches in one cubic foot. Multiply the outside dimensions in inches, divide by 1,728 and then multiply by quantity. If your inputs are metric, the calculator performs the conversion automatically.
Add weight for density
If you enter the gross weight of each handling unit, the tool also returns total weight, pounds per cubic foot and the current density-band class estimate. Use the dedicated freight-class calculator for a fuller explanation of classification limitations.
Frequently asked questions
How many cubic inches are in a cubic foot?
There are 1,728 cubic inches in one cubic foot.
How do I calculate freight cube?
Multiply length × width × height for the packed handling unit, convert the result to cubic feet and multiply by quantity.
Can I convert cubic feet to CBM?
Yes. One cubic meter is approximately 35.3147 cubic feet. The calculator shows both units.
Why enter weight?
Weight lets the tool calculate shipment density in lb/ft³ and provide a density-based freight-class estimate.
Sources & verification
Verify carrier-sensitive rules against the source governing your shipment.
Formula reviewed September 29, 2026 Representative values and boundary cases are tested automatically.