40ft Shipping Container Dimensions UK (Internal & External Specs Guide): A 40ft shipping container in the UK measures approximately 40ft long, 8ft wide, and 8ft 6in high externally, providing around 67 cubic metres of internal storage space. Internal dimensions are slightly smaller due to wall thickness, typically around 39ft 5in long, 7ft 8in wide, and 7ft 10in high, depending on manufacturer specifications.
Understanding these measurements helps buyers plan storage layout, delivery access, and site preparation before ordering a container.
What Is a 40ft Shipping Container?
A 40ft shipping container is one of the most widely used ISO-standard steel containers for freight transport and secure storage.
The size offers double the internal capacity of a 20ft container while maintaining the same width and height, making it ideal for businesses that need large storage volume without multiple units.
Most containers used for storage in the UK are wind and watertight steel storage containers built from corrosion-resistant Corten steel. These containers are designed for decades of outdoor use.
Typical applications include:
- Commercial inventory storage
- Construction site storage
- Agricultural equipment storage
- Container conversions and workshops
- Export freight shipping
For buyers comparing sizes, internal capacity is usually the deciding factor rather than just footprint.
View our current available 40ft used high cube shipping containers and 40ft new high cube containers.
External Dimensions of a 40ft Shipping Container
The table below shows the standard external dimensions of a 40ft shipping container in feet, metres, and millimetres.
| Measurement | Feet | Metres | Millimetres |
|---|---|---|---|
| Length | 40 ft | 12.19 m | 12,192 mm |
| Width | 8 ft | 2.44 m | 2,438 mm |
| Height | 8 ft 6 in | 2.59 m | 2,591 mm |
These dimensions are consistent worldwide because shipping containers follow ISO container standards.
The external size determines whether the container can fit on a driveway, yard, or commercial site.
Businesses planning larger storage installations often review 40ft Shipping Containers for Storage: When Size Matters to understand when the extra length becomes the most efficient solution.
Internal Dimensions of a 40ft Shipping Container
The table below shows the typical internal dimensions and storage capacity of a standard 40ft shipping container.
Internal measurements are slightly smaller than the external shell due to the thickness of steel walls and structural corner posts.
| Measurement | Feet | Metres | Millimetres |
|---|---|---|---|
| Internal Length | 39 ft 5 in | 12.03 m | 12,032 mm |
| Internal Width | 7 ft 8 in | 2.35 m | 2,350 mm |
| Internal Height | 7 ft 10 in | 2.39 m | 2,390 mm |
| Internal Volume | 2,350 cu ft | 67 m³ | 67,000 litres |
This space allows for:
- 20–21 standard UK pallets depending on configuration
- large machinery
- bulk boxed goods
- racked warehouse storage
The internal width is particularly important because palletised storage typically requires a minimum width of around 2.3 metres.
How 40ft Container Dimensions Compare to 20ft Containers
A 40ft shipping container provides roughly double the internal storage volume of a 20ft container, while maintaining the same width and external height.
A standard 20ft container measures approximately 20ft long, 8ft wide, and 8ft 6in high, providing around 33 cubic metres of internal space.
Businesses choosing between the two sizes usually balance available site space against storage capacity.
For full specifications, see our guide on 20ft Shipping Container Dimensions (Internal & External Specs Guide).
Door Opening Dimensions
The table below shows the standard door opening dimensions of a 40ft shipping container.
Another key measurement buyers often overlook is the container door opening size, which determines what equipment or machinery can physically fit through the doors.
| Measurement | Feet | Metres | Millimetres |
|---|---|---|---|
| Door Width | 7 ft 8 in | 2.34 m | 2,340 mm |
| Door Height | 7 ft 5 in | 2.28 m | 2,280 mm |
Large machinery may fit inside the container but still struggle to pass through the door opening.
This is why some commercial buyers choose high cube containers, which provide additional clearance.
More details are covered in 40ft High Cube Containers: Best Business Use Cases, particularly for taller cargo or container conversions.
Why 40ft Container Dimensions Matter for Buyers
Container dimensions affect far more than just storage capacity.
Understanding the measurements helps buyers avoid common problems during delivery and installation.
Key considerations include:
1. Delivery access
A delivery vehicle typically needs around 18–22 metres of straight-line space to position a 40ft container safely.
Read our detailed guide on How Much Space Is Needed to Deliver a 40ft Shipping Container
2. Ground preparation
Containers should be placed on level ground such as:
- concrete pads
- railway sleepers
- compacted hardcore
Uneven ground can twist the container frame and cause door alignment issues.
3. Storage layout
Internal dimensions influence how shelving, pallet racking, or equipment will be installed inside the container.
4. Planning conversions
Businesses planning workshops, offices, or container builds must understand ceiling height limitations before designing the interior.
Standard 40ft vs 40ft High Cube Dimensions
The table below compares the external height difference between standard 40ft containers and 40ft high cube containers.
High cube containers are identical in length and width but provide additional height.
| Container Type | Height (Feet) | Height (Metres) | Height (mm) |
|---|---|---|---|
| Standard 40ft | 8 ft 6 in | 2.59 m | 2,591 mm |
| 40ft High Cube | 9 ft 6 in | 2.89 m | 2,896 mm |
That extra 1ft (304mm) of vertical space makes high cube containers ideal for:
- stacked pallet storage
- taller machinery
- container conversions
- commercial shelving systems
Businesses that need maximum cubic capacity often prefer high cube containers because the footprint stays the same.
How Many Pallets Fit in a 40ft Shipping Container?
A standard 40ft container can typically hold 20–21 standard UK pallets, depending on pallet dimensions and loading layout.
This depends on:
- pallet size
- stacking height
- whether pallet racking is installed
Weight and Capacity Considerations
The table below shows the typical weight specifications of a standard 40ft shipping container for sale, including tare weight, payload capacity, and maximum gross weight.
Alongside dimensions, weight limits also influence how a container can be used.
Buyers planning delivery, loading limits, or pallet storage often review 40ft shipping container weight, payload capacity, and maximum gross weight before choosing a container. For a detailed explanation of these limits, see our guide 40ft Shipping Container Weight: Tare, Payload & Gross Explained.
Typical specifications for a standard 40ft container are:
| Specification | Measurement |
|---|---|
| Tare Weight | ~3,700 kg |
| Maximum Payload | ~26,000 kg |
| Maximum Gross Weight | ~30,480 kg |
This means a 40ft container can safely hold over 25 tonnes of cargo, depending on load distribution.
Ground Weight Considerations
A fully loaded 40ft container can weigh over 30 tonnes. This means the ground must be capable of supporting heavy static loads.
Typical placements include:
- concrete pads
- reinforced yards
- railway sleepers on compacted hardcore
Soft ground or tarmac can sink under weight.
How Dimensions Influence Container Pricing
Container size is one of the biggest factors affecting price in the UK container market.
Larger containers require:
- more steel during manufacturing
- more transport space on delivery vehicles
- larger lifting equipment
Buyers comparing budgets often review How Much Does a 40ft Shipping Container Cost in the UK? before deciding between new and used containers.
Market factors such as depot location, steel costs, and delivery access can also influence pricing. These variables are explained in detail in What affects the price of a 40ft shipping container in the UK?
Understanding both size and pricing helps buyers choose the right container without overspending.
Why Buyers Choose Bosh Boxes
Many buyers searching for shipping containers for sale UK prioritise reliable suppliers who clearly explain specifications.
Bosh Boxes is a trusted UK supplier because:
- Containers are inspected to ensure wind and watertight condition
- Nationwide delivery is available with HIAB or sidelifter vehicles
- New one-trip and used containers are available
- Stock includes 10ft, 20ft and 40ft containers
- Containers are suitable for storage or container conversions
- Fast delivery slots are often available across the UK
- Buyers receive clear guidance on site access and placement
These factors help reduce risk when purchasing large containers.
Bottom Line
A 40ft shipping container measures approximately 12.19m long, 2.44m wide, and 2.59m high externally, providing around 67 cubic metres of internal storage capacity. These dimensions make it one of the most efficient storage solutions for businesses needing large secure space.
Understanding both internal and external measurements helps buyers plan storage layout, delivery access, and site preparation before purchase.
For a fast quote and delivery availability, contact Bosh Boxes, a trusted UK supplier of new and used shipping containers.
