FedEx Dimensional Weight Formula:
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Dimensional weight (also known as volumetric weight) is a pricing technique for commercial freight transport which uses an estimated weight calculated from the length, width and height of a package. FedEx and other carriers use dimensional weight to account for the space a package occupies in relation to its actual weight.
The calculator uses the FedEx dimensional weight formula:
Where:
Explanation: The formula calculates the cubic size of a package and converts it to a dimensional weight value that carriers use for billing purposes.
Details: Carriers charge based on whichever is greater - the actual weight or the dimensional weight. Accurate calculation helps estimate shipping costs correctly and avoid unexpected charges.
Tips: Measure your package at its longest point in each dimension. Enter length, width, and height in inches. All values must be greater than zero.
Q1: Why do carriers use dimensional weight?
A: Carriers use dimensional weight to account for the space a package occupies in their vehicles, as lightweight but large packages take up valuable space that could be used for heavier items.
Q2: Is the dimensional factor always 139?
A: For FedEx domestic shipments, the factor is 139. International shipments and other carriers may use different factors (e.g., 166 for UPS, 139 for DHL).
Q3: How do I measure package dimensions correctly?
A: Measure to the nearest inch, rounding up to the next whole number. Measure the longest point in each dimension including any bulges or protrusions.
Q4: What if my package is irregularly shaped?
A: For irregular shapes, measure the package as if it were in a rectangular box that would completely contain it.
Q5: When is actual weight used instead of dimensional weight?
A: Carriers will charge based on whichever weight is greater - the actual weight or the dimensional weight.