Container Load Calculator
Find out how many identical cartons fit in a shipping container, which way to turn them, and whether you will run out of space or weight first.
How the calculation works
The tool tests each allowed orientation of your carton against the container's internal length, width and height, counts how many whole cartons fit along each axis, and keeps the best result. It then caps that number by the container's typical payload so you never plan an overweight box.
Cartons per container = min(Fit, Payload ÷ carton weight)
This is a uniform block-stacking estimate. Professional load planners mix orientations in different zones of the container and can often squeeze in 3–8% more. Treat the result as a safe floor.
Specifications used
| Type | Internal L × W × H (m) | Payload used |
|---|---|---|
| 20' Standard | 5.898 × 2.352 × 2.393 | 28,000 kg |
| 40' Standard | 12.032 × 2.352 × 2.393 | 26,700 kg |
| 40' High Cube | 12.032 × 2.352 × 2.698 | 26,500 kg |
| 45' High Cube | 13.556 × 2.352 × 2.698 | 27,600 kg |
Many countries restrict the gross weight of a loaded container on public roads, which can be well below the container's own payload — especially for 20' boxes of heavy goods like tiles or metal. Ask your forwarder for the road limit at both ends.
Frequently asked questions
Why can't I use the full 33 CBM of a 20ft container?
Cartons rarely divide evenly into the container's dimensions, so gaps remain along the walls and ceiling. Loaders also need a little working space. Utilisation of 80–90% is good.
Should I palletise for FCL?
Floor-loading loose cartons fits more goods; pallets load and unload faster and protect fragile items. Many buyers floor-load FCL and palletise LCL.
Does a High Cube cost much more?
Often a 40' High Cube is priced the same or only slightly more than a 40' standard, yet adds about 30 cm of height. For light, bulky goods it is usually the better value.