The short answer: choose a 20ft shipping container if you have limited space or moderate storage needs, and a 40ft container if you need maximum capacity and have room for delivery. A 20ft holds roughly the contents of a one-to-two-bedroom home or a small business’s inventory, while a 40ft holds about double that — but it also needs significantly more room to deliver and place. Your decision usually comes down to how much you’re storing and how much site space you have.
Here’s how to choose between a 20ft vs 40ft shipping container with confidence.
20ft vs 40ft shipping container dimensions
Both sizes share the same standard width (about 8 feet) and standard height (about 8 feet 6 inches). The difference is length:
- 20ft container: ~20 ft long × 8 ft wide × 8 ft 6 in high. Roughly 160 sq ft of floor space and about 1,170 cubic feet of storage.
- 40ft container: ~40 ft long × 8 ft wide × 8 ft 6 in high. Roughly 320 sq ft of floor space and about 2,385 cubic feet of storage.
If you need more vertical room, both sizes also come in a High Cube version that adds about a foot of height. Our guide to shipping container sizes — 20ft, 40ft, and High Cube breaks down every dimension in detail.
What a 20ft container is best for
A 20ft container is the right call when:
- You have a tight lot, smaller yard, or limited job-site space
- You’re storing the contents of a smaller home, a garage, or a small business
- You need a container that’s easier to deliver and reposition in confined areas
- You want a single, manageable unit for tools, equipment, or seasonal storage
Because it needs less room to drop and maneuver, the 20ft is often the only practical option on residential lots and tight commercial sites. Explore 20ft used containers and 20ft one-trip containers.
What a 40ft container is best for
A 40ft container makes sense when:
- You need to store a lot — the contents of a larger home, bulk inventory, or large equipment
- You’re running a construction site, farm, or business with heavy storage needs
- You have a driveway, lot, or yard with room for both the container and the delivery truck
- The cost-per-square-foot matters — a 40ft typically gives you more storage space relative to its footprint of two 20ft units
If you’re converting a container into a workshop, office, or living space, the extra length is often worth it. See 40ft used containers and 40ft High Cube one-trip containers.
Delivery space: the deciding factor people forget
Capacity isn’t the only thing that should drive your choice — delivery access often decides it. A 40ft container on a standard tilt-bed truck needs a long, straight, clear approach to off-load. (Truck length and load rules are governed federally by the FMCSA, which affects what your driver can physically do on tight sites.) On a tight lot, a 40ft simply may not fit even if your storage needs would prefer it.
As a rough rule, plan for the delivery truck plus the container length plus maneuvering room. A 20ft is far more forgiving on cramped sites. Before you decide, read how to prepare for shipping container delivery and measure your actual access path — it can change which size is even possible.
A simple way to decide
If you’re weighing a 20ft vs 40ft shipping container, ask yourself two questions:
- How much am I storing? Moderate → 20ft. A lot → 40ft.
- How much room do I have for delivery and placement? Tight → 20ft. Plenty → 40ft, but confirm the truck can get in.
If your storage needs say 40ft but your site can only handle a 20ft, the site wins — or you consider two 20ft units. When in doubt, a quick call to a local supplier who knows your area’s delivery realities saves a lot of guesswork.
Get the right size for your site
Blairworx delivers both 20ft and 40ft containers — new and used — across the Southeast, including Charleston, Atlanta, Jacksonville, and Tampa. Because we know the delivery conditions in the areas we serve, we can help you pick a size that actually fits your site — not just your storage list. If you’re still weighing condition and budget, our new vs used containers guide helps there too.
Frequently Asked Questions
Is a 20ft or 40ft shipping container better?
Neither is universally better — it depends on your needs. A 20ft suits limited space and moderate storage; a 40ft suits maximum capacity when you have room for delivery. Available site space is often the deciding factor.
How much can a 20ft vs 40ft container hold?
A 20ft container offers about 160 sq ft of floor space (roughly a one-to-two-bedroom home’s contents). A 40ft offers about 320 sq ft — roughly double the capacity.
Do 20ft and 40ft containers cost the same to deliver?
Delivery requirements differ. A 40ft needs more room and a longer, clearer approach for the tilt-bed truck. On tight sites a 40ft may not be deliverable at all, which is why measuring your access path matters before choosing.
What size container do I need for home storage?
For most household storage, a 20ft container handles the contents of a smaller home or garage, while a 40ft suits a larger home or when you’re storing furniture plus equipment. Match the size to both your volume and your available space.
Can I fit a 40ft container on a residential lot?
Sometimes, but it requires a long, clear, straight approach for the delivery truck. Many residential lots can only accommodate a 20ft container. Always measure your delivery access before ordering a 40ft.