📦 Free tool
CBM calculator
Carton dimensions in → cubic meters out, plus which container your shipment fits. Get the freight picture before you buy.
Estimate only. Usable capacity ≈ 33 / 67 / 76 CBM for 20GP / 40GP / 40HQ; plan with 80–90% in practice.
FAQ
What is CBM in shipping? +
CBM = cubic meters: the volume your cartons occupy. Sea freight (LCL) is usually charged per CBM, and FCL pricing depends on which container your total CBM fits into.
How much fits in a 20GP / 40GP / 40HQ? +
Rough usable capacity: 20GP ≈ 33 CBM, 40GP ≈ 67 CBM, 40HQ ≈ 76 CBM. Real loadable volume is less once pallets, odd shapes and loading gaps are factored in — forwarders typically plan with 80–90% of these figures.
Volumetric weight vs actual weight? +
Air and express couriers charge by volumetric (dimensional) weight when it exceeds actual weight. For sea freight, CBM is the main driver on LCL quotes. This calculator covers volume; confirm weight-based charges with your forwarder.