What is dimensional weight?
Dimensional (DIM) or volumetric weight reflects how much space a package takes up relative to its actual weight. Carriers bill the greater of the two, called the chargeable weight.
How to calculate it
- Express parcels (inches): L × W × H ÷ 139 = DIM weight in lbs
- Air freight (cm): L × W × H ÷ 6000 = DIM weight in kg
- Ocean LCL: billed per cubic meter (1 CBM ≈ 1,000 kg)
Reduce your shipping costs
Use the smallest box that safely fits your item, avoid excessive void fill, and consider poly mailers for soft goods. A 2-inch reduction on each side of a box can cut DIM weight by 30% or more.
This guide is general information, not legal advice. Regulations change — contact our team to confirm requirements for your specific shipment.