Pack every product into the perfect box.
Carton Fit works out exactly how many units fit in each shipper carton — and how many boxes your whole order needs. No guesswork, no wasted void space, no over-paying for air.
Free to start — no credit card. Your first pack plan in minutes.
Down to the last retail unit
Everything you need to turn a product and a box into an exact, repeatable pack — and a plan your warehouse can actually follow.
Units per box
Get the exact number of units that fit in each shipper carton or case — orientation-aware, so nothing is left on the table.
Boxes needed
Enter any order quantity and Carton Fit tells you how many boxes to pack, plus the leftover in the last one.
Any product shape
Cartons, cans, bottles, pouches, drums and odd shapes — mix them and Carton Fit nests them efficiently.
Your boxes & sizes
Work in millimetres, save a reusable box library, and reuse your real shipper cartons across every job.
2D & 3D layouts
See exactly how items stack inside the box with an interactive 3D view and a printable 2D plan.
Clean exports
Hand the floor a tidy PDF or image pack list — no spreadsheets, no ambiguity on the line.
Three steps to a packed box
Add your product
Type the dimensions and weight, or pick a saved item. Bottles, cans and pouches are first-class shapes, not approximations.
Pick the shipper box
Choose the carton or case you ship in — or compare a few candidates to find the tightest, lightest fit.
Get the pack plan
Carton Fit returns units-per-box, total boxes for your order, and a 3D/2D layout you can export and share.
Teams that ship physical product
E-commerce & FMCG
Right-size cartons for SKUs and kits so you stop shipping air and overpaying DIM weight.
Manufacturers
Standardise case packs and master cartons across product lines with repeatable, documented counts.
3PLs & fulfilment
Quote and pack client orders fast with exportable, floor-ready box plans.
Wholesale & retail
Plan inner/outer packs and pallet-ready cases before a single label is printed.
Good to know
How is Carton Fit different from Freight?
Carton Fit packs products into shipper cartons and cases (units-per-box, boxes needed). Freight stuffs those boxes, pallets and cargo into shipping containers and trailers. Pro Plus includes both.
Can it handle bottles, cans and pouches?
Yes. Cylinders and soft/odd shapes are modelled directly rather than treated as rectangular blocks, so the counts reflect how the items actually nest.
Do I work in inches or millimetres?
Everything is configured in millimetres for precision, and you can save your real shipper cartons to a reusable box library.
What can I export?
A clean PDF and image pack list with the 2D/3D layout, units-per-box and box count — ready to send to the warehouse floor.
Stop guessing your box counts
Try Carton Fit free and get your first units-per-box and boxes-needed plan in minutes.
ContainerMathThe industry standard for 3D container cargo packing and loading plans. Optimize layouts, maximize volume, and reduce shipping overhead.