Stone calculator
How many slabs fit in a container
Pick slabs, tiles or blocks and the container: you see what one weighs, how many fit and when the load passes the limit.
What you ship
Enter
Typical 2.7, range 2.6–2.8 t/m³
Container
Default: the rated payload of a typical 20′ dry, 28,200 kg. Packing covers A-frames, crates, wedges and lashing.
One slab
328kg
345 kg with packing
Slabs that fit
81
492.5 m²
Your load
20.68 t
73% of 28.20 t · 364.8 m²
Containers
1
20′ dry
The shipping line and the roads set the real limit, often lower than the rated payload. Check with your forwarder before you load.
See it with your own blocks and slabs.
Book a demoHow it's calculated
items that fit = payload ÷ (one item's weight × (1 + packing))
Each item weighs its volume × density, plus an allowance for A-frames, crates and lashing. Stone reaches the weight limit long before the box is full. For blocks, the size is also checked against the box and its door.
Example
Granite slabs of 3.2 × 1.9 m at 2 cm: 6.08 m² × 0.02 m × 2.7 t/m³ = 328 kg each, 345 kg with 5% packing. A 20′ rated for 28,200 kg takes 81 slabs, about 492 m².
Typical weights in a 20′
Granite or marble at 2.7 t/m³, no packing allowance, against the typical rated payload. The shipping line and the roads often allow less.
| Stone | Weight | In a 20′, 28,200 kg |
|---|---|---|
| Tiles or slabs, 1 cm | 27 kg/m² | 1,044 m² |
| Tiles or slabs, 2 cm | 54 kg/m² | 522 m² |
| Tiles or slabs, 3 cm | 81 kg/m² | 348 m² |
| One slab, 3.2 × 1.9 m, 2 cm | 328 kg | 85 slabs |
| Block, 1 m³ | 2,700 kg | 10 m³ |
Typical container sizes
| Container | Inside (L × W × H) | Door (W × H) | Rated payload |
|---|---|---|---|
| 20′ dry | 5.90 × 2.35 × 2.39 m | 2.34 × 2.28 m | 28,200 kg |
| 40′ dry | 12.03 × 2.35 × 2.39 m | 2.34 × 2.28 m | 26,700 kg |
Sources
- BWS: 20′ dry container · 20′ dry: rated payload 28,200 kg
- SeaCube: 40′ standard dry · 40′ dry: rated payload 28,860 kg
- Goodhope: 40ft container · 40′ dry: rated payload 26,730 kg
With Noria Strata, every slab and block you load keeps its weight and size, from the yard to the packing list.
Book a demoQuestions
By weight, about 81 slabs of 3.2 × 1.9 m at 2 cm, around 490 m², if the container may carry 28.2 t and packing adds 5%. At 3 cm it is about 54 slabs. Your shipping line and the roads may allow less.
A typical 20′ dry container has a maximum gross weight of 30,480 kg and carries about 28 t of cargo; the exact figure is on its CSC plate. Shipping lines and road rules often set a lower limit, so ask your forwarder.
Yes, if it passes the door, about 2.34 m wide and 2.28 m high, and is shorter than the box. Larger blocks go in open-top containers, loaded by crane from above, or on flat racks. Weight usually decides first: one large block can fill a 20′.
Stone reaches the weight limit long before the box is full. A 40′ is rated for about the same payload as a 20′, so it carries no more stone.
