Mr Kcal insight
How to Calculate CBM for China Shipping
CBM is one of the first numbers buyers need before comparing sea freight, air freight, or container loading assumptions.
CBM formula
For carton dimensions in centimeters, multiply length by width by height and divide by 1,000,000. Then multiply by the number of cartons. For meters, multiply length by width by height directly.
Why suppliers must provide carton data
A product unit size is not enough for freight quotes. Ask for export carton length, width, height, gross weight, net weight, carton quantity, and packing method.
CBM versus volumetric weight
CBM measures volume. Volumetric weight converts volume into a billable weight using a divisor such as 5000 or 6000 for air and express estimates.
Checklist
Confirm carton dimensions, carton count, gross weight, whether pallets are used, and whether the cartons are final production cartons before requesting freight quotes.
Related tools and guides
Disclaimer
This guide is for general planning only. Confirm commercial, customs, tax, legal, and logistics decisions with qualified professionals or the relevant service provider.
CBM guide
Calculate carton volume before discussing freight.
CBM means cubic meters. For carton dimensions in centimeters, multiply length by width by height, then divide by 1,000,000. CBM is a volume measure, while volumetric weight is a chargeable-weight estimate used by many carriers.
Formula
CBM per carton = length cm x width cm x height cm / 1,000,000. Total CBM = CBM per carton x carton quantity.
Supplier data
Ask for packed carton dimensions, carton quantity, gross weight, net weight, and whether cartons are palletized.
Quote preparation
Share CBM, weight, pickup city, destination, Incoterms, and ready date when asking a forwarder for a quote.
Before you use the result
- Do not use product size when the packed carton size is different.
- Do not confuse CBM with air express volumetric weight.
- Confirm final carton data after production packing is complete.