Shipping container dimensions are standardised closely enough for global handling, but the figures buyers need are not all the same. External dimensions determine the space a container occupies. Internal dimensions and door openings determine what fits inside. Tare, payload and maximum gross weight answer different weight questions.
The figures below are typical industry specifications for dry freight containers. Manufacturers, production series, floor construction and container type can change the usable measurements and weights. Always check the owner’s specification and the markings on the actual container before loading, lifting or arranging transport.
Typical shipping container dimensions
| Container | External L × W × H | Typical internal L × W × H | Typical door W × H | Approx. volume |
|---|---|---|---|---|
| 20ft standard dry | 6.058 × 2.438 × 2.591m | 5.90 × 2.35 × 2.39m | 2.34 × 2.28m | 33m³ |
| 40ft standard dry | 12.192 × 2.438 × 2.591m | 12.03 × 2.35 × 2.39m | 2.34 × 2.28m | 67m³ |
| 40ft high cube | 12.192 × 2.438 × 2.896m | 12.03 × 2.35 × 2.69m | 2.34 × 2.58m | 76m³ |
These measurements are rounded typical values, not a loading guarantee. Door seals, locking gear, corrugations and internal fittings reduce usable space. Reefer insulation and machinery reduce it further.
20ft container dimensions
A standard 20ft dry container is 6.058m long, 2.438m wide and 2.591m high externally. Its internal length is typically about 5.90m. The shorter box often suits dense cargo because its physical volume may be filled before its permitted payload becomes the limiting factor, but heavy loads still need axle and road-vehicle planning.
Typical tare weight is around 2.2 to 2.4 tonnes. A common maximum gross rating is 30.48 tonnes, leaving a nominal payload of roughly 28 tonnes, but the actual CSC plate and container data must be used.
40ft container dimensions
A standard 40ft dry container is 12.192m long with the same 2.438m width and 2.591m height. Internal length is usually about 12.03m. It offers roughly twice the volume of a 20ft box, but it does not normally offer twice the payload because tare weight is higher and maximum gross ratings may be similar.
Typical tare weight is about 3.6 to 3.9 tonnes. A nominal payload around 26.5 to 26.8 tonnes is common where maximum gross mass is 30.48 tonnes. Again, use the actual box data.
40ft high-cube dimensions
A 40ft high cube adds about 305mm, or one foot, to the external height. That increases the internal height and door opening, making the type useful for light but bulky cargo. It also raises the overall road height when carried on a trailer, so bridges, canopies and site entrances matter.
External, internal and door measurements
Measure the limiting point, not the most generous one. A machine may fit within the internal width but still fail at the door. Pallets may fit individually but leave unusable gaps because of their orientation. Long items need clearance to turn through the opening. If centimetres matter, arrange a physical check of the allocated unit.
Container weights explained
- Tare weight: the empty container.
- Payload: the cargo mass the container is rated to carry.
- Maximum gross mass: container, cargo and packing materials together.
A container rating does not override legal road vehicle, axle or route limits. For packed containers entering sea transport, the IMO explains that the shipper is responsible for providing the verified gross mass in time for vessel stowage planning.
Choosing a size for transport
Start with cargo dimensions, weight, loading method and delivery access. Then check the door, internal space, floor loading, securing points and actual gross mass. A different container type may be better for tall, temperature-controlled or out-of-gauge cargo.
For port and depot road movements, request container transport. To relocate an owned empty storage box between sites, use the shipping container moving service.
Frequently asked questions about Shipping Container Dimensions and Sizes
What are the external dimensions of a 20ft shipping container?
A standard dry 20ft container is typically 6.058m long, 2.438m wide and 2.591m high externally. Check the actual unit because container types and production specifications vary.
What are the external dimensions of a 40ft shipping container?
A standard dry 40ft container is typically 12.192m long, 2.438m wide and 2.591m high. A 40ft high cube is usually 2.896m high.
Why are internal container dimensions smaller?
The walls, roof, floor, corrugations, door gear and seals occupy space. Reefer insulation and refrigeration machinery reduce usable dimensions further.
Is payload the same as maximum gross weight?
No. Payload is the cargo allowance. Maximum gross mass includes the container tare weight, cargo and packing materials.
Do all 20ft containers have identical dimensions?
No. External dimensions are closely standardised, but internal measurements, door openings, tare and payload can vary by manufacturer and type.
Does a container weight rating mean it can travel on any road vehicle?
No. The provider must also comply with the vehicle, axle, route and road limits that apply to the movement.
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