How Many Pallets Fit in a 20-Foot Container?

Shipping goods across oceans and continents depends on one deceptively simple question: how many pallets can you fit inside a container? A 20-foot shipping container is one of the most widely used sizes in global trade, and understanding its pallet capacity is essential for anyone involved in warehousing, importing, exporting, or distribution.

The short answer is that a standard 20-foot container holds between 10 and 11 pallets in a single layer, depending on pallet type. Double-stacking can push that to 20 or 22. But the real answer depends on pallet dimensions, cargo height, weight restrictions, and loading arrangement.

Standard 20-Foot Container Dimensions

A standard 20-foot dry container (TEU — Twenty-foot Equivalent Unit) has external dimensions of approximately 20 feet long, 8 feet wide, and 8 feet 6 inches high. Internally, it measures roughly 19 feet 4 inches in length (5.9 meters), 7 feet 8 inches in width (2.35 meters), and 7 feet 10 inches in height (2.39 meters), providing approximately 1,172 cubic feet of volume.

The floor area of about 13.86 square meters is the critical measurement for pallet planning. Container doors can slightly reduce usable depth, and weight capacity is equally important: maximum gross weight is approximately 30,480 kg (67,200 lbs), with a tare weight of about 2,300 kg, leaving roughly 28,180 kg (62,130 lbs) of payload. For dense goods, you will hit the weight limit long before running out of floor space.

Common Pallet Types and Their Dimensions

US/GMA Pallets

The GMA pallet measures 48 by 40 inches (1,219 x 1,016 mm) and is ubiquitous in North American supply chains. Its larger footprint means fewer fit per container compared to European alternatives, but it is the default for most US and Canadian shipments.

Euro Pallets (EUR/EPAL)

The Euro pallet measures 1,200 by 800 mm (approximately 47.24 x 31.5 inches). Its narrower width allows an extra unit across the container width in some arrangements, adding up over the full container length. It is the dominant standard across the European Union.

UK Standard Pallets

UK standard pallets measure 1,200 by 1,000 mm (approximately 47.24 x 39.37 inches). Their dimensions are close enough to GMA pallets that loading patterns are often similar, typically yielding the same container count.

Single-Stack Pallet Capacity

US/GMA Pallets: 10 per container.The most efficient arrangement places pallets in two rows of five. Each pallet's 40-inch side faces the container wall, with the 48-inch side running lengthwise. Two pallets across consume 2,032 mm of the 2,350 mm available width. Five pallets along the length total 6,095 mm, a snug fit within the 5,900 mm interior.

Euro Pallets: 11 per container. The narrower footprint allows a more efficient arrangement. The typical layout places five in one row and six in a staggered or alternating configuration. Most freight forwarders quote 11 as the standard single-layer capacity.

UK Standard Pallets: 10 per container. Two pallets across at 1,000 mm each consume 2,000 mm, leaving 350 mm of clearance. Five pallets along the length at 1,200 mm each total 6,000 mm — just over the internal length but manageable with tight placement.

Double-Stack Pallet Capacity

Double-stacking places a second layer on top of the first, effectively doubling capacity: 20 US or UK pallets or 22 Euro pallets. This works for lightweight goods like packaged snacks, plastic products, textiles, or consumer electronics.

The primary constraint is height. Each stack including the pallet must stay under about 1,150 mm to maintain clearance within the container's 2,390 mm internal height. Weight is the other critical factor — even 10 single-stacked pallets may approach the payload limit with dense products. Stability during ocean transit is a third concern: top layers must be secured with shrink wrap, banding, or strapping to survive constant rocking and vibration.

Factors That Affect Real-World Capacity

Weight restrictions: The container payload limit is roughly 28 metric tons, but road limits in the destination country may be stricter. US highway limits typically cap at about 20,000 kg of cargo weight. European limits vary by country but often cap around 24,000 kg.

Forklift access: Pallets nearest the door need clearance for fork entry. Some facilities strip containers by hand (devanning), which eliminates this concern but adds labor cost.

Cargo shape and overhangs: Boxes that extend beyond pallet edges reduce effective space between pallets. Any cargo extending more than 25 mm beyond the pallet edge should be flagged during planning.

Pallet condition: Worn or repaired pallets may have different dimensions than specification. Always inspect pallets before loading and reject those outside acceptable tolerances.

Load optimization techniques: Rotating alternating pallets by 90 degrees can sometimes create a tighter pattern. Partial stacking — some double-stacked, others not — helps fill vertical space without overloading. Software tools like Cape Pack and Cube-IQ model different arrangements before committing.

How to Calculate Pallet Capacity Yourself

Take the container's internal width (2,350 mm) and divide by the pallet dimension oriented across the width. Then divide the internal length (5,900 mm) by the dimension running lengthwise. Multiply the two results, rounding down.

Example for Euro pallets:2,350 ÷ 800 = 2.94 (2 across) × 5,900 ÷ 1,200 = 4.92 (4 deep) = 8 pallets. This underestimates because it ignores mixed orientations. By turning some pallets sideways to fill remaining gaps, experienced loaders achieve 10 to 11. Simple division gives a conservative floor; real optimization requires spatial reasoning or planning software.

Key Takeaways

Standard capacities of 10 to 11 pallets single-stacked and 20 to 22 double-stacked serve as reliable baselines. The final number depends on pallet type, cargo dimensions, weight, and operational requirements at both ends of the supply chain.

Always confirm pallet dimensions, check loaded weight against both the container limit and road regulations, and use load planning software when possible. A container packed to theoretical maximum is only useful if goods arrive undamaged — stability, weight distribution, and proper securing are just as important as fitting one more pallet inside.

For businesses shipping regularly, even moving from 9 to 10 pallets per container represents an 11 percent improvement in space efficiency, translating directly to lower per-unit freight costs and a genuine competitive advantage.