How Many 45×35×30 cm Boxes Fit a Shipping Container?
A 45×35×30 cm carton, standing upright with no lying on its side, packed with the same algorithm as our Container Loading Calculator:
| Container | Inner size (cm) | Boxes (rotation allowed) | Boxes (fixed orientation) | Volume used |
|---|---|---|---|---|
| 20GP | 589×235×239 | 588 | 546 | 84% |
| 40GP | 1,203×235×239 | 1,218 | 1,092 | 85% |
| 40HC | 1,203×235×269 | 1,392 | 1,248 | 86% |
| 45HC | 1,355×235×269 | 1,568 | 1,440 | 86% |
Open the calculator with 588 of these boxes pre-filled ›
Why the fill rate isn't 100%
A simple volume division — container volume ÷ box volume — would suggest 700 boxes in a 20GP, about 19% more than the 588 this tool actually places. Cartons pack as whole units in rows and layers, so length and width that don't divide evenly into the container's inner floor leave a strip of unusable space along one or two edges — that gap is the difference between a volume estimate and a real loading plan.
Rotation and door clearance
Allowing the carton to rotate 90° on the floor (but still keeping it upright) fits the most extra boxes in a 40HC: 1,392 versus 1,248 if every carton has to face the same way, about 12% more. Door height isn't a concern here: the tallest edge of this carton is 45 cm, well under the 227 cm door opening on the smallest container type.
Weight and other limits
These counts are volume-only: they assume the cargo is light enough that space runs out before weight does. Real cargo is heavier, cartons bulge slightly, and forklift work leaves gaps, so actual loads often run a few cartons short of these numbers — quote "about N cartons" rather than the exact count. If you know the per-carton weight, use the full calculator to check it against the payload limit. The calculator starts from these defaults (20GP 21,700 kg, 40GP 26,500 kg, 40HC 26,500 kg, 45HC 27,500 kg); the real limit for your box is on the CSC plate on its door, and trucking or port rules may be lower.
FAQ
How many 45×35×30 cm boxes fit in a 20ft container?
588 boxes, allowed to rotate 90° flat on the floor and upright only (no lying on its side). That's about 84% of the container's inner volume — the rest is unusable gaps along the walls, since 45×35×30 cm doesn't divide evenly into the container's inner floor.
Does rotating the box help fit more in a 40HC?
Yes — allowing the box to rotate 90° in the horizontal plane fits 1,392 in a 40HC versus 1,248 if it has to stay in one fixed orientation, about 12% more.
Will it fit through the container door?
Yes, in every orientation. The tallest edge of this box is 45 cm, well under the narrowest door opening used here (227 cm on a standard container), so door height is never the limit for a box this size.
Why not just divide the container's volume by the box's volume?
Because that ignores shape: a plain volume division for a 20GP would suggest 700 boxes, about 19% more than the 588 that actually fit, because real cartons are packed as whole units along the floor and walls, not sliced to fill every last gap. This page's numbers come from the same packing algorithm as our full calculator, not a volume estimate.
Does this account for weight limits?
Not on this page — the counts above assume the cargo is light enough that volume, not weight, is the limit (20GP containers are commonly rated around 21,700 kg). If your actual per-carton weight is significant, use the full calculator with your real weight to see whether you hit the container's weight limit before it's full.