How many 20 × 20 × 20 in boxes fit in a 40ft container?
20 × 20 × 20 in boxes of 508 × 508 × 508 mm (also called 4.6 cubic foot cube boxes) in a 40-foot standard container (40GP) — inner dimensions 12,032 × 2,352 × 2,393 mm. Calculated by the Cubestow engine on 2026-09-08.
Boxes may be laid on any side. 71% of the space used, 4 layers high, about 4,416 kg (17% of payload). Open this load in the 3D planner →
Top view — floor layer (92 on the floor)
Side view — first row along the wall (4 layers)
The answer in detail
A 20 in cube — used as a master carton for lightweight bulky goods (pillows, packaging, toys).
Twice the floor of a 20ft at the same width and height. Its rated payload is usually a little lower than a 20ft, so dense cargo often maxes out weight before space.
The simple grid estimate is 23 along the length × 4 across × 4 high = 368. Here no mixed pattern beats the best uniform grid, so the engine's plan is exactly that grid (368).
Variants
| Loading rule | Fits | Layers | Volume used | Total weight |
|---|---|---|---|---|
| Boxes may be laid on any side (headline figure) | 368 | 4 | 71% | 4,416 kg (17% of payload) |
| Boxes kept this-side-up (turned on the floor plane only) | 368 | 4 | 71% | 4,416 kg (17% of payload) |
How many 40ft containers for a given order?
| 20 × 20 × 20 in boxes | 100 | 250 | 500 | 1,000 | 2,500 | 5,000 |
|---|---|---|---|---|---|---|
| 40ft containers needed | 1 | 1 | 2 | 3 | 7 | 14 |
| Last one filled to | 27% | 68% | 36% | 72% | 79% | 59% |
Mixed cargo, different carton sizes or delivery stops? Plan the exact shipment in 3D — free, in the browser, nothing uploaded.
Frequently asked
How many 20 × 20 × 20 in boxes fit in a 40ft container?
368 20 × 20 × 20 in boxes of 508 × 508 × 508 mm fit in a 40ft container (inner dimensions 12,032 × 2,352 × 2,393 mm), boxes may be laid on any side. That uses 71% of the 67.7 m³ available and weighs about 4,416 kg.
What are the inner dimensions of a 40ft container?
Typical inner dimensions are 12,032 mm long, 2,352 mm wide and 2,393 mm high (473.7 × 92.6 × 94.2 in), giving 67.7 m³ of space and a rated payload of about 26,700 kg. Individual units vary by a few centimetres, so check the actual box for tight loads.
How much does a full load of 20 × 20 × 20 in boxes weigh?
368 × 12 kg ≈ 4,416 kg, which is 17% of the 26,700 kg payload — so this load is limited by space, not weight.
How was this number calculated?
By running the Cubestow 3D load-planning engine on the exact dimensions above, allowing all six orientations, stacking with at least 80% base support and the container's payload limit, then re-validating the plan for overlaps, support and weight. Real loads leave room for dunnage, door clearance and uneven cartons, so treat the figure as the practical maximum.