3D Container Loading Planner for Luggage Cartons

Order quantity and container size are the same decision, and most buyers make them separately. This planner puts them together: choose a container, enter your carton sizes and quantities, and it returns a three-dimensional loading plan with the volume, the payload used and a carton sequence that can actually be loaded.

Open the planner full screen

Container dimensions the planner works from

The plan is built on the internal dimensions of four standard containers, with the maximum payload each one is rated for. These are the numbers the tool applies; if your forwarder quotes different internal figures for a specific box, use theirs.

What the plan returns

Running a plan produces five things, and the fifth is the one that saves arguments later:

• Volume and CBM — what the order occupies, which is the figure your forwarder will quote against.
• Utilisation — how much of the container the cartons actually fill, by volume and by payload. A plan that is fine by volume but heavy by payload is a common trap on dense hard-shell cartons.
• Payload check — whether the loaded weight stays inside the container rating, which is the constraint that quietly kills an otherwise good plan.
• Centre of gravity — where the mass sits along the container, because a load that fits can still be unsafe to move.
• Plan validation — a pass or fail on the loading sequence, so you see the problem before the container is at the dock.

Running a plan in three steps

1. Select the container. Start with the one you expect to book, then re-run the same order against the next size up or down. The comparison is where the useful answer is: the question is rarely "does it fit", it is "which size do I book".
2. Enter the cartons. Use the packed carton dimensions, not the product dimensions. A suitcase measured at 65 cm becomes a carton at roughly 68 cm once the inner box and the outer carton are counted, and that three centimetres is what changes the count per layer.
3. Generate the plan. Read the validation result before the utilisation figure. A high utilisation with a failed sequence is worse than a slightly lower one that loads.

What the planner cannot know

It is a geometric packing engine, and it is honest about that. Three things sit outside it:

It does not know which cartons are fragile or which face must stay up, so any stacking rule specific to your product has to be applied to the sequence afterwards. It does not know the stowage rules your forwarder or the carrier applies, which can override a tighter plan. And it plans cartons, not pallets — if your goods are palletised, plan the pallet footprint instead.

That is why the output is a starting plan to argue with, not a booking document. Where the plan and the forwarder disagree, the forwarder wins.

Working out the order quantity behind the plan

Most buyers arrive at this tool with the container already chosen and the carton count unknown. It works in the other direction too: fix the container, then read backwards to the order quantity that fills it without going over the payload. That number is the one to take into a quotation.

If the plan shows a part load, the choice between shipping it as it stands and moving to LCL is a commercial one, not a geometric one — our factory facts page covers the production and lead-time side that usually decides it. Certificates that the buyer will ask for alongside the quotation are listed with their registration numbers in the certification and compliance library.

Related pages

Constructions and their packed weights: aluminium frame luggage and PC polycarbonate luggage. To have a plan run against a live quotation, or to check a specification before you commit to a quantity, use the contact form — it reaches the same team that runs these calculations.

Questions about the planner

Does the planner replace the loading plan my forwarder issues? No. It gives you a validated starting plan you can send with the booking, and it lets you compare container sizes before you commit. The carrier's stowage plan remains the document of record.

Why do my carton dimensions give a different count than expected? Almost always because product dimensions were entered instead of packed carton dimensions, or because the carton is not square to the container wall. Re-measure the packed carton, including any pallet base if one is used.

Can it plan a mixed order of several carton sizes? The planner takes carton rows, so different sizes can be entered together. What it cannot judge is which of those cartons must stay on top, so sequence the fragile ones yourself.