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Supply Chain Glossary
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Dimensional weight

What is Dimensional Weight?

Dimensional weight, also known as volumetric weight, is a pricing technique used by shipping carriers to calculate the cost of shipping packages based on their volume rather than just their actual weight. This method helps carriers account for the space that a package occupies in relation to its weight, ensuring fair pricing for shipping services.

How to Calculate Dimensional Weight?

Dimensional weight is calculated by multiplying the package's length, width, and height (in inches) and then dividing by a dimensional factor, typically provided by the carrier. The formula is:

Dimensional Weight= Length×Width×Height​ / Dimensional Factor

The dimensional factor varies between carriers and is used to convert the volume into a weight measurement (usually pounds or kilograms) that reflects the package's density.

Dimensional Weight vs. Actual Weight

The actual weight of a package is its physical weight when measured on a scale. In contrast, dimensional weight is a theoretical weight calculated based on the package's size and volume. Carriers will charge the higher of the two weights — dimensional or actual — to ensure they are compensated appropriately for the use of their shipping space.

Dimensional weight is particularly relevant for lightweight packages that occupy a large volume, such as bulky items or packages with extensive packaging material. It encourages shippers to optimize their packaging to reduce wasted space and transportation costs.

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