A 20 ft container typically holds 10 pallets of 48 × 40 in (1219 × 1016 mm) or 11 Euro pallets of 1200 × 800 mm (47.2 × 31.5 in) in a single layer. A 40 ft container holds about 20 to 21 standard North American pallets or about 24 Euro pallets. A 40 ft high-cube has the same floor as a standard 40 ft box, so its single-layer count is the same; the extra height only helps when pallets are stacked or loads are tall.
Container dimensions that set the limits
Standard ISO freight containers (classified in ISO 668) share an external width of 8 ft (2.44 m). Inside, the usable space is smaller and varies a little between manufacturers. Typical internal dimensions are:
| Container | Internal length | Internal width | Internal height |
|---|---|---|---|
| 20 ft | about 5.90 m (19 ft 5 in) | about 2.35 m (7 ft 8 in) | about 2.39 m (7 ft 10 in) |
| 40 ft | about 12.0 m (39 ft 6 in) | about 2.35 m (7 ft 8 in) | about 2.39 m (7 ft 10 in) |
| 40 ft high-cube | about 12.0 m | about 2.35 m | about 2.69 m (8 ft 10 in) |
The high-cube is one foot (about 30 cm) taller than the standard box, and published comparisons give its volume as about 2,695 cubic feet versus 2,350 for the standard 40 ft. Door openings are slightly smaller than the interior, which limits the height of the top pallet in the last row.
The width is the critical figure. Two Euro pallets turned the long way across would need 2,400 mm (2 × 1200 mm), and three turned the short way would need the same 2,400 mm (3 × 800 mm). Both exceed the usable width of about 2,350 mm, so Euro pallets cannot fill the width of a standard container in a simple row, and loaders mix orientations to use the space.
Typical single-layer pallet counts
Counts depend on the layout, the pallet dimensions with overhang and how much clearance the loaders leave for bracing. The table summarizes commonly reported values for single-layer loading.
| Pallet | 20 ft | 40 ft | 40 ft high-cube |
|---|---|---|---|
| Standard 48 × 40 in (1219 × 1016 mm) | 10 | 20 to 21 | 20 to 21 |
| Euro pallet 1200 × 800 mm | 11 | about 24 | about 24 |
| Industrial 1200 × 1000 mm | around 10 | around 20 to 23 | around 20 to 23 |
Sources agree on a range of roughly 10 to 11 pallets in a 20 ft and 20 to 24 in a 40 ft container. Treat any single number as a planning value, not a guarantee: counts for the 1200 × 1000 mm pallet vary with layout, and a loading plan should be drawn for the actual pallet and cargo dimensions. See ISO 6780 pallet sizes and the 1200 x 1000 mm industrial pallet for the pallet formats.
Layouts: how loaders fit pallets
Because the container width is awkward for most standard pallets, two patterns are used:
- Straight loading: pallets all face the same way in rows. It is simple and fast, but leaves unused gaps.
- Pinwheel (or mixed) loading: pallets in alternate rows or pairs are turned 90 degrees to fill the width. It gives the best count, but needs careful placing, and each row's gaps must be filled or braced.
Practical rules for planners:
- Leave small clearances for forklift forks and for the lashing or bracing material.
- Mind overhang: cartons that stick out beyond the pallet edge reduce the usable space and the pallet count.
- Pallets must not exceed the width of the door opening.
- Fill empty spaces in the last row with dunnage, airbags or blocking to prevent shifting, as described in dunnage, blocking and bracing in containers.
Weight limits often decide
Container floor area is only half of the picture. Maximum gross weight for standard 20 ft and 40 ft containers is up to 36,000 kg (79,370 lb) under the current ISO 668 rating (many older boxes are plated at 30,480 kg), though the payload after subtracting the tare weight of the box varies by container and the shipping line or country may set a lower limit for road transport. Published guides note that weight limits often max out before the floor space fills, especially for dense goods such as beverages, tiles or chemicals.
Pallet weight also counts. A wooden pallet is a significant weight on every pallet position, and a lighter pallet saves payload on dense cargo; typical pallet weights are in the pallet weight guide. Check three limits in every plan: the container's rated payload, the legal road or rail weight in the destination, and the evenness of load distribution along the box.
Double stacking and height
A 40 ft high-cube allows taller pallets or double stacking of low pallets, but not automatically:
- The total height of the stacked loads must fit the internal height with space for handling, about 2.69 m in a high-cube.
- The bottom pallet must carry the loads above it. For example, the EPAL Euro pallet is rated for stacking up to a maximum load of 5,500 kg on the bottom pallet on a solid floor, but cartons also need enough compression strength.
- A stack in a moving container needs strapping or film and bracing against lateral shifting.
See pallet stacking: safe heights and rules and load securing for palletised cargo for the stability principles that apply.
Refrigerated and special containers
Refrigerated (reefer) containers have the same external dimensions, but thick insulation and the refrigeration unit reduce the interior length, width and height. The T-shaped floor that distributes air also requires loads to stay below the load line and to leave space for airflow. Pallet counts are therefore lower than in dry boxes, and the exact number depends on the reefer model; planners should use the dimensions printed on the container or provided by the carrier. Pallets for cold-chain use are discussed in pallets in the cold chain.
Open-top, flat-rack and "pallet-wide" containers also exist. Pallet-wide containers are slightly wider inside than standard ISO containers, so that two 1200 mm pallets fit side by side; check the exact dimensions with the carrier before relying on a higher count.
Planning checklist
- Measure the loaded pallet, including overhang, not just the pallet footprint.
- Choose a pattern (straight or pinwheel) and draw it to scale, or use loading software offered by carriers or forwarders.
- Check payload and distribution of weight.
- Plan bracing, airbags, strapping and dunnage.
- Make sure wood pallets and dunnage comply with ISPM 15 for the destination, see ISPM 15 explained.
- Leave a safety margin: real loading rarely matches the theoretical maximum.
Frequently asked questions
How many Euro pallets fit in a 40 ft container?
About 24 in a single layer according to commonly published figures, although clever layouts can add one or two with exact loading. The actual number depends on cargo overhang and bracing.
How many 48 x 40 pallets fit in a 20 ft container?
Usually 10, arranged in rows across the 2.35 m width and along the 5.9 m length. Slightly different layouts and tolerance can allow 11.
Does a high-cube container hold more pallets?
Not in a single layer, because the floor is the same as a standard 40 ft container. It adds capacity only when pallets are stacked or loads are tall.
Which limit is reached first, weight or space?
For heavy or dense goods, weight. For light, bulky goods, space. Both must be checked in every load plan.
Sources
- How many pallets fit in a container? — Eveon Containers
- How many pallets fit in 20ft and 40ft shipping containers — Container Exchanger
- How many pallets fit in a 20ft and 40ft container — FreightAmigo
- IMO/ILO/UNECE Code of Practice for Packing of Cargo Transport Units (CTU Code) — International Maritime Organization
- EPAL Euro Pallet (EPAL 1) technical data — European Pallet Association