Pick a container or pallet and enter your box size — see how many cartons fit and how much space they use.
This container loading calculator estimates how many cartons fit in a shipping container or on a pallet — the number that drives your freight cost per unit. It divides each internal dimension by the matching box dimension, rounds down, and multiplies to get a clean stacked count, testing box orientations to find the best simple fit. Presets cover 20ft and 40ft containers and a standard pallet, or enter custom internal sizes.
This is an ideal grid estimate; real loads lose a little to pillars, door recesses, pallet overhang and weight limits, so treat it as an upper bound. Mixing orientations and rotating layers by hand can sometimes beat a single grid — but a clean stack is faster to load and unload.
Related: Volumetric Weight · Amazon FBA Fee Calculator