The number of square metres in a 20 ft container depends on how much each square metre weighs. Tiles reach the weight limit long before they fill the space, so a thin, light tile fits far more square metres than a thick porcelain one.
As a rough guide, a 20 ft container of 600x600 vitrified tiles around 9 mm thick often holds roughly 1,200 to 1,500 m². Always ask the factory for its own loading plan, because box weights and pallet rules differ.
The method
You can estimate any load with three numbers from the factory's packing list:
- The allowed cargo weight, which is the net load your shipping line and route accept.
- The weight of one box and the square metres in it.
- The weight of each pallet, if the tiles are palletised.
Divide the allowed weight, minus pallets, by the box weight to get the number of boxes. Multiply by the square metres per box. That gives the square metres per container.
A worked example
Suppose the cargo limit for your route is 26 tonnes. A box of 600x600 tiles holds four tiles, or 1.44 m², and weighs 30 kg. That is about 21 kg per square metre.
If the tiles go on 25 pallets of about 25 kg each, the pallets use roughly 625 kg. That leaves about 25,375 kg for tiles, or around 845 boxes. At 1.44 m² per box, that is about 1,215 m².
If the same tile is a little thinner and the box weighs 26 kg, the load rises to about 975 boxes, or around 1,400 m². A small change in thickness changes the load noticeably. These are illustrative numbers, not a promise for any factory.
What moves the number
- Thickness: every extra millimetre adds weight per square metre and cuts the load.
- Body: porcelain is denser than ceramic wall tile, so it weighs more for the same thickness.
- Size: large formats are often thicker and heavier per square metre, and need stronger packing.
- Packing: pallets, wooden crates and corner protection all add weight that is not tile.
- Route: some lines, ports and road rules at destination accept less weight than others.
Wall tiles are the clearest example. A thin ceramic wall tile weighs much less per square metre than vitrified floor tile, so a 20 ft container can carry considerably more of it. Mixed containers fall in between.
Why the weight limit varies
The legal and practical cargo limit is not one number. It depends on the container's rating, the shipping line's rules and the road limits at both ends. These are covered in full in the maximum payload for a tile container. For planning by tile size, see the weight limit per tile container.
What to ask the factory
- Ask for the box weight, square metres per box and boxes per pallet for each size.
- Ask for a loading plan showing pallets, boxes, gross weight and square metres per container.
- Ask whether the plan uses your shipping line's weight limit or a generic figure.
- Compare quotes from different factories on square metres per container, not only on price per square metre.
Next step
We check packing lists and loading plans before you pay the advance, and supervise loading so the container matches the plan. To plan your first container, book a free sourcing review.