PackMize guide
Container loading guide
CBM is not the final answer
Container volume is useful for a quick upper bound, but cartons must still tile the internal length, width and height. Door dimensions and payload can reduce capacity further.
20 ft, 40 ft and High Cube
High Cube equipment mainly adds internal height. Whether that creates another useful carton layer depends on the carton height and allowed rotations.
Use actual equipment when possible
Internal dimensions vary slightly. For operational planning, use the dimensions from the actual carrier or container specification rather than relying only on a generic preset.