Plan container loading and stuffing in 3D — dense, weight-legal load plans.
ContainerMath is container loading and stuffing software that arranges your cargo, pallets and crates into balanced, high-density 3D load plans — compared across 50+ container, trailer and rail types, then exported for the team that actually loads them.
Free to start — no credit card. Your first load plan in minutes.
One cargo list, packed every way you can ship it
Everything you need to turn a dispatch list into a dense, weight-legal load plan — and prove it before you book the box.
50+ vessel types
Sea containers, trucks, trailers, rail wagons and IATA air ULDs — compare capacity, internal dimensions and payload side by side.
Automatic 3D packing
Drop in a cargo list and get a dense, ordered 3D arrangement — no manual Tetris, no wasted cubic metres.
Weight & balance
Stay within payload limits and keep loads balanced front-to-back so they're road-legal and safe to move.
Crate, pallet & mixed modes
Load loose cartons, palletized goods, trolleys or a mix of all three — together in one plan.
AI manifest import
Paste a messy dispatch list and let AI turn it into structured, ready-to-pack cargo in seconds.
Clean exports
Hand the warehouse a tidy 3D/2D load plan as a PDF or image — clear stacking order, no spreadsheets.
Auto-Pack Optimizer
Don't know which equipment to book? Feed in the cargo and the Optimizer ranks the vessels that fit it, cheapest first — so you book the right box instead of guessing.
Lane scheduling calendar
Plan sailings and departures across your lanes on a shared calendar, with each booking's load plan attached. On Pro Plus.
Export documents
Generate the shipment's paperwork — commercial invoice, packing list, proforma — with line items sent straight from your calculation. Compliant formats for India, the EU, US, UK and more. Included in Pro Plus and Custom.
Plan in five languages
Core planning surfaces work in English, Spanish, French, German and Portuguese — so your whole team plans in the language they work in.
Share a read-only plan
Send a finished 3D plan to your warehouse or customer with a link — they open it in the browser, no login. Saving a plan to share is included from Pro Plus up.
Walk the load in augmented reality
Open a saved plan in AR on your phone and walk around the packed container before the real one is built.
Three steps to a loaded container
Add your cargo
Paste a dispatch list, AI-import a manifest, or add items by hand — dimensions, weight and quantity.
Pick your vessels
Choose the containers or trailers to load, and compare a few to find the densest, cheapest fit.
Get a balanced plan
ContainerMath returns a weight-aware 3D load plan with utilization and a stacking order you can export.
Container stuffing, planned before the box arrives
Container stuffing is the part of export container loading that decides whether a booking pays off. The container is a fixed volume with a fixed payload; everything else — which cartons go in first, which pallets stand on which, where the heavy crates sit — is a plan, and most of that plan is still made on the loading bay with a tape measure and a forklift driver's judgement. ContainerMath moves it off the bay and onto a screen, where it can be checked before anything is booked.
You start from the dispatch list: dimensions, weights and quantities for each line, pasted in or imported. Choose the container or trailer, and the packing engine arranges the cargo in three dimensions — respecting stacking limits, orientation rules and the payload on the plate — and returns how many units fit, how many containers the consignment needs, and how full each one runs by volume and by weight. That last pair matters more than it looks: dense cargo reaches the weight limit with the box half empty, and light cargo fills the cube with payload to spare. Knowing which limit binds is how you decide whether to re-pack, re-book or split the load.
The plan is then handed to the people who stuff the container. A printable loading chart gives the crew the stacking order, a 2D cross-section of each layer and the centre of gravity, so the load goes in the way it was planned and stays balanced when the doors close. For road legs, per-axle weights are checked against the legal limits before the trailer leaves the yard — and when a layout sits over an axle limit, the planner looks for a legal re-stow rather than only raising a warning. The container stuffing guide walks through the method step by step.
Export container loading adds paperwork to the stuffing. Because the plan already carries every line item, its quantities and weights can feed the packing list and commercial invoice directly through export documents, so what the documents declare is what was actually loaded.
Teams that move freight
Freight forwarders
Quote loads fast and prove cube utilization to customers with shareable 3D plans.
Exporters & manufacturers
Plan export consignments and squeeze more product into every booked container.
3PLs & hauliers
Balance trailer loads within axle and payload limits before the truck leaves the yard.
Importers & distributors
Check how an order will load — and what it'll cost to ship — before you commit.
Good to know
What is container stuffing?
Container stuffing is the process of loading cargo — boxes, pallets and crates — into a shipping container or trailer for transport; it's the same job freight teams call container loading. ContainerMath plans the stuffing for you: it arranges items into a dense, weight-balanced 3D layout and hands the warehouse a clear loading order.
Is there a free container loading calculator?
Yes — ContainerMath works as a container loading calculator: enter your cargo and it calculates how much fits, the best stacking arrangement, and the space and weight used, then shows the result as a 3D load plan. It's free to start with no card, and the free CBM calculator handles quick cubic-metre sums.
How is this different from Carton Fit?
Carton Fit packs products into shipper cartons and cases. ContainerMath loads those boxes, pallets and cargo into shipping containers and trailers. Both are in the same workspace, on every plan.
Which vessels are supported?
50+ vessel types across sea, road, rail and air — including IATA air ULDs on Pro Plus — plus a custom vessel library on Pro Plus and above, so you can model your own equipment exactly.
Can it handle weight limits and balance?
Yes. Plans respect each vessel's payload limit and keep the load balanced front-to-back, so what you plan is actually safe and legal to move.
Can I import a manifest?
Paste a dispatch list and AI import structures it for you. When the plan's ready, export a clean 3D/2D load plan as a PDF or image.
Still evaluating? Read how the main container loading software options compare and what each one actually costs.
Stop loading containers by eye
Try ContainerMath free and get a balanced, high-density 3D load plan in minutes.
ContainerMathThe industry standard for 3D container cargo packing and loading plans. Optimize layouts, maximize volume, and reduce shipping overhead.
Built by Backrock Studios