Dimensional Shipping Explained

Last Updated on by Catherine Tobsing

If a package exceeds 1 cubic foot (12” L x 12” W x 12” H), the carrier (USPS/FedEx/UPS) will use the volume of the package, rather than the weight, to determine the cost of shipping which we call “dimensional shipping”.

First, measure the length, width and height in inches, and round to the nearest whole inch. Multiply length x width x height to calculate the cube size. Divide the cube size by 194 (or 166 for international destinations). Round the resulting DIM up to the nearest full pound. For example, if the DIM equals 10.39, round up to 11 pounds.

For Example: What Happens When A 2-lb Box Exceeds 1 Cubic Foot (12 x 12 x 12) & DIM Is Applied?

Priority Mail 12” x 12” x 14” 2 lbs LA to Chicago $9.62
DIM 12 x 12 x 14 = 2,0162,016/194 = 10.39 11 lbs LA to Chicago $33.86

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