CBM
Cubic Meter — the unit of volume used to calculate cargo space, calculated as length × width × height in meters.
MeasurementTL;DR: This term is one of 28 definitions in the China–GCC freight glossary, so the signal is the number it changes — not the acronym. It sits in the Measurement category and links to 3 related terms for adjacent freight math. Use the example below to turn the definition into a before/after calculation before you quote or clear cargo.
What it means
CBM (cubic metre) is the standard unit of cargo volume, computed as length × width × height in metres. It is the pricing basis for LCL sea freight and the starting point for working out how much fits in a container. A 20ft container holds roughly 28 CBM and a 40ft container about 58 CBM of usable space, though the actual loadable volume depends on packaging and how well the cargo stacks. For China-to-GCC importers, accurate CBM is essential: understate it and your LCL quote will be wrong; overstate it and you pay for space you are not using. Freight forwarders compute CBM from the carton dimensions on the packing list, so keeping precise outer-carton measurements is the simplest way to keep freight bills accurate.
Why it matters on the China–GCC route
CBM is the currency of volume-based freight — an accurate packing list in cubic metres is what keeps LCL and container-planning costs correct.
Example
A shipment of 200 cartons, each 0.6m × 0.4m × 0.3m, is 200 × 0.072 = 14.4 CBM — just over the point where FCL starts to beat LCL.
Related terms
LCL
Less than Container Load — cargo from multiple shippers consolidated into one container, priced by volume (CBM).
Learn more →Volumetric Weight
A weight derived from a shipment’s volume, used by air carriers to charge for low-density cargo.
Learn more →Chargeable Weight
The greater of actual weight and volumetric weight, used as the basis for air freight billing.
Learn more →