What is Dimensional weight?

Dimensional (DIM) weight is a package’s “size weight”: length × width × height ÷ a carrier divisor. Carriers charge for whichever is greater — actual or DIM weight.

Example

A 14×10×8 in box ÷ 139 has a DIM weight of 8.06 lb, billed as 9 lb even if it weighs 4 lb.

Why it matters

Oversized boxes quietly inflate shipping costs; a smaller box can cut them immediately.

Calculate it: Dimensional Weight Calculator

DIM weight and billable weight by carrier

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Question

What is dimensional weight?

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Answer

Dimensional (DIM) weight is a package’s “size weight”: length × width × height ÷ a carrier divisor. Carriers charge for whichever is greater — actual or DIM weight.

Related terms

CBM

CBM is the volume of a shipment in cubic meters (length × width × height in meters). Sea and air freight are priced on volume and weight.

Landed cost

Landed cost is the total cost of getting a product to where you sell it: product cost + freight + insurance + duties + customs and other fees.

Read more in our guide: Dimensional Weight Explained: Why Your Shipping Costs More Than It Should