1100 × 1100 Pallet Calculator (ISO)

How the ISO 1100 x 1100 fit is worked out

The 1100 x 1100 mm pallet is the ISO / Asian square pallet, the dominant footprint across Japan, Korea and much of Southeast Asia. Because it is square, the two flat orientations of a box give the same count unless the box itself is square, so the pattern depends only on how the box length and width divide into 1100 mm. This calculator lays boxes flat on the deck, takes the better orientation, then stacks identical layers to a target height.

Per layer:

boxes per layer = max( floor(1100 / boxL) x floor(1100 / boxW), floor(1100 / boxW) x floor(1100 / boxL) )

The pallet is about 140 mm tall, so a 1200 mm total load leaves roughly 1060 mm of box stack:

layers = floor(usable height / boxH) and total = boxes per layer x layers.

Worked example (page defaults)

Using the defaults of a 35 x 30 x 25 cm carton (350 x 300 x 250 mm) on the ISO 1100 x 1100:

• Orientation A: floor(1100 / 350) x floor(1100 / 300) = 3 x 3 = 9 cartons per layer
• Orientation B: floor(1100 / 300) x floor(1100 / 350) = 3 x 3 = 9 cartons per layer
• Best layer = 9 cartons (9 x 350 x 300 = 945,000 mm2 of the 1.21 m2 deck, about 78% floor use because square pallets leave edge strips).
• Height: 1060 / 250 = 4 layers.
• Total = 9 x 4 = 36 cartons, with a load height of 140 + (4 x 250) = 1140 mm.

ISO / Asian spec table

A square deck tends to leave matching strips on two edges with rectangular cartons, so floor use is often lower than on a rectangular pallet of similar area. This is a single-orientation estimate that does not interlock courses or rotate individual boxes. Compare the rectangular alternative in the Industrial 1200 x 1000 calculator, check the layer pattern in the TI-HI calculator, or start over in the main pallet calculator.