Dimensional weight is a standard formula used in the freight industry that considers volume when determining charges.
This billing technique is used to calculate the shipping fee for a package that is much bigger than what it actually weighs.
Dimensional Weight calculation:
L x W x H / 166
L = Length in inches
W = Width in inches
H = Height in inches
A child car seat that has a cubic size of 19inches x 18inches x 26inches and weighs 23 lbs.
Although the item weighs only 23 lbs, its shipping fee will be based on dimensional weight due to its bulky size.
19 x 18 x 26 / 166 = rounded up to 54 lbs
Thus, the child car seat that weighs 23 lbs would be charged as if it weighed 54 lbs.
Packages subject to dimensional-weight pricing include the following items,
which are much bigger than their actual weight: Furniture (includes nursery products), l
arge toys & dolls, baby bath tubs & car seats, luggage, bicycles, large musical instruments and bedding products.