20-Foot Container Dimensions: Exact Specs for Size, Weight, Capacity, and Pallet Count

A site superintendent ordering a 20-foot container for the first time usually asks the same three questions: Will my material fit inside? Can the ground handle the loaded weight? And do I actually need a 20-footer, or should I go bigger?

The answers come down to the numbers. A standard 20-foot shipping container gives you 1,172 cubic feet of storage volume, 150 square feet of floor space, and close to 48,000 lbs of payload capacity. Those figures change if you go with a high-cube unit or a specialty configuration. The rest of this guide puts every measurement in one place so you can spec the right container before placing the order.

Exterior and Interior Dimensions of a 20-Foot Shipping Container

ISO-standard 20-foot storage containers all share the same exterior footprint. The 20-foot designation refers to length only. Width and height are uniform across 10-foot, 20-foot, and 40-foot containers.

Interior dimensions run slightly smaller than the exterior because corrugated steel walls and the plywood-over-steel floor consume space. Wall thickness varies by manufacturer, but the numbers below represent the ISO standard.

For projects using imperial or metric-specific plans, here are the same specs converted to smaller units.

For a full breakdown of every ISO container size, see the shipping container dimensions guide.

Weight, Volume, and Floor Space: 20-Foot Container Capacity

Tare weight is the container itself. Payload is the maximum cargo weight. Add them together and you get the gross weight limit: 52,910 lbs. If you are placing the container on asphalt, a parking lot, or soft ground, factor gross weight into your surface preparation. A fully loaded 20-footer exerts roughly 3,300 lbs per linear foot across its two bottom rails.

For more on container weight ratings and ground-bearing pressure, see the shipping container weight guide.

20-Foot Standard vs. 20-Foot High Cube: Side-by-Side Comparison

A high-cube container adds 1 foot to the exterior height (9 ft 6 in vs. 8 ft 6 in), which translates to 12 extra inches of interior clearance. That single foot adds 144 cubic feet of volume and raises payload capacity significantly.

When to choose a high cube: if you are stacking pallets two-high and need vertical clearance, storing vehicles or tall machinery, or using the container as a temporary workspace where head clearance matters. 

The added height also makes a difference for HVAC ductwork if you are converting the unit into a jobsite office.

When standard works fine: if your cargo stays below 7 ft and you want lower tare weight and a smaller delivery profile. Standard containers are also easier to stack in multi-unit configurations because they match the height of adjacent 40-foot standard units.

Pallet Capacity: How Many Pallets Fit in a 20-Foot Container

Pallet count depends on the pallet footprint and whether you are single-loading or double-stacking.

With a high-cube container and stackable cargo, you can double-stack standard pallets and fit 20 American pallets or 22 Euro pallets in a single load.

These counts assume the cargo sits flat and the pallets are loaded from the door end. If your load plan requires side access, a double-door container with openings on both ends lets you load from either side and reduces dead space at the back wall.

CBM Calculation for a 20-Foot Container

CBM stands for cubic meters. Freight carriers, customs brokers, and logistics planners use CBM to quote container loads and calculate volumetric weight.

Formula:

CBM = Interior Length (m) x Interior Width (m) x Interior Height (m)

Standard 20-foot container: 5.89 m x 2.33 m x 2.4 m = 33 CBM

High-cube 20-foot container: 5.89 m x 2.33 m x 2.69 m = 37 CBM

In practice, you will not load a full 33 CBM of boxes into a standard container. Stacking patterns, air gaps between cartons, and the need for a load path to the back wall reduce usable volume to roughly 25-28 CBM. Heavy cargo that fills the payload limit before it fills the volume is called “weighing out.” Light cargo that fills the volume before the payload limit is called “cubing out.” Knowing which applies to your load determines whether you need a bigger container or a second unit.

What Fits Inside a 20-Foot Shipping Container

Dimensions on paper do not always make it obvious what actually fits. Here are real-world loading examples based on average item sizes:

• One-bedroom apartment: Full contents including furniture, appliances, and boxes

• Vehicles: 1-2 standard sedans (with mirrors folded)

• Appliances: Approximately 50 standard refrigerators

• Electronics: Approximately 400 flat-screen televisions (boxed)

• Archive storage: Roughly 933 standard file boxes

• Construction materials: 24 sheets of 4x8 plywood laid flat with room above for additional cargo

For construction storage, a 20-footer handles most jobsite needs: materials, tools, PPE, and small equipment. If you are storing ride-on equipment like skid steers or scissor lifts, measure the machine dimensions against the door opening (7 ft 8 in wide x 7 ft 6 in tall) before scheduling delivery. Machines that clear the interior ceiling may not clear the door header.

One-Trip vs. Used: Condition Grades for 20-Foot Containers

If you are buying rather than renting, two condition grades are available.

One-trip containers have made a single overseas voyage carrying cargo from the factory to the U.S. Exterior paint is intact, floor is undamaged, and rubber door gaskets seal properly. These cost roughly twice as much as used units but carry minimal wear. Average lifespan from purchase: 20-25 years.

Used containers have 5-10 years of shipping service. They may show surface rust, minor dents, and floor scuffing. Doors still seal and the structure remains sound. For jobsite storage where cosmetics are secondary, used units deliver the same security and weatherproofing at half the cost. Mobile Modular Portable Storage inspects every used container before sale or rental.

Pricing depends on your location, delivery distance, and any modifications (shelving, lighting, lock upgrades, ventilation). For current pricing, request a quote or call 225-269-2349.

Specialty 20-Foot Container Configurations

Standard dry-van containers cover most storage and shipping applications. When they do not, three specialty configurations fill the gap.

High-Cube Containers: 1 foot of added interior height (8 ft 10 in total). Use for tall machinery, vertically stacked pallets, and temporary workspace conversions where standing headroom matters.

Double-Door Containers: Swing doors on both ends. Eliminates the dead zone at the back wall. Speeds up loading and unloading for construction materials, event equipment, and retail inventory. Allows forklift access from either end without repositioning the container.

Flat Rack Containers: No side walls. Collapsible end walls fold down for oversized and irregular cargo like structural steel, pipe, and heavy equipment that cannot fit through a standard door opening.

Mobile Modular Portable Storage stocks all three specialty types for rental and purchase across 30+ locations in 27+ states.

Quick-Reference Dimension Chart

Get the Right Container on Your Site

Every container order starts with two questions: what are you storing, and how long do you need it? Mobile Modular Portable Storage delivers 20-foot containers across 30+ U.S. locations, with quotes returned within one hour and 30-day billing cycles that save 8.3% compared to competitors running 28-day billing.

Request a quote online, or call 225-269-2349 to speak with a container specialist who can recommend the right size, configuration, and delivery window for your project.