Dimensional weight, also called DIM weight or volumetric weight, is a shipping pricing method based on the amount of space a package occupies rather than only its scale weight. Carriers calculate it by multiplying length, width, and height, then dividing by a dimensional factor. The carrier usually compares dimensional weight with actual weight and charges based on the higher number. DIM weight is especially important for large, lightweight packages that take up valuable truck, aircraft, or warehouse space.
Dimensional weight (also called volumetric weight) is a pricing method used by air freight carriers and some courier services that calculates a theoretical weight based on cargo dimensions. Carriers charge the greater of actual weight or dimensional weight.
How to Calculate Dimensional Weight
- Air freight: (L cm x W cm x H cm) / 6,000 = kg
- Express couriers: (L cm x W cm x H cm) / 5,000 = kg
- LCL ocean freight: 1 CBM = 1,000 kg for comparison purposes
Light, bulky shipments almost always bill on dimensional weight in air freight. Reducing packaging dimensions reduces the billable weight and freight cost.
For related logistics context, see glossary entries on Billable Weight, Volumetric Weight, CBM, and Air Freight.
