How Do I Determine the Right Size of Storage Container for My Needs? | Bolted Box

Container Insights

How Do I Determine the Right Size of Storage Container for My Needs?

For most Indiana contractors and commercial operations, the choice comes down to two options: a 20ft container or a 40ft container. Both are high cube one-trip units that arrive ground-level and ready to use. The right size depends on how much you need to store, how much site space you can spare, and how your crew will access the container throughout the project. This guide walks through both options with real specs and practical guidance so you can make the call confidently. For pricing and availability, visit our storage container rentals page.

A 20ft and 40ft one-trip container side by side. Both are high cube units delivered ground-level across Indiana.

The specs side by side

Both containers are 8 feet wide and sit at ground level with no ramps or steps required. The difference is length and total storage volume. Here is how they compare:

Spec	20ft Container	40ft Container
Exterior length	20 ft	40 ft
Interior length	~19'4"	~39'5"
Interior width	~7'8"	~7'8"
Interior height	~8'10"	~8'10"
Floor space	~160 sq ft	~320 sq ft
Cubic volume	~1,170 cu ft	~2,390 cu ft
Standard pallets	10 to 11	20 to 21
Rental rate	$150 to $165 per cycle	$170 to $185 per cycle

Billing runs in 28-day cycles rather than calendar months, which aligns better with project timelines and job costing. The rate stays fixed for the life of the rental with no mid-project increases, and there is no minimum term so you keep the container as long as the work lasts.

When the 20ft is the right call

The 20ft container is the practical choice for smaller crews, tighter sites, and projects where storage needs are moderate. At 160 square feet of floor space it holds tools, equipment, and materials for a single crew without taking up more site footprint than you can spare. Specific situations where the 20ft wins:

Tight delivery access. A 20ft unit needs roughly 60 feet of straight-line backing room. If your site has limited maneuvering space, the shorter container is much easier to place.
Smaller crew or single trade. If one crew is using the container and turnover is frequent, a 20ft keeps everything organized and accessible without a long walk to the back of the unit.
Short projects. For a renovation or a quick phase of work, a 20ft gives you what you need at a lower cost per cycle.
Budget priority. At $150 to $165 per four-week cycle versus $170 to $185 for the 40ft, the 20ft saves money over a long rental when the extra space is not being used.

A new one-trip 20ft container. Compact footprint, same high cube height as the 40ft, and easier to place on tighter sites.

When the 40ft is the right call

The 40ft container doubles the floor space and nearly doubles the cubic volume for a modest cost increase per cycle. For most commercial construction and industrial projects with open site access, it is the better value. Specific situations where the 40ft wins:

Large or multi-trade crews. When multiple crews need access to the same container, the extra length means people are not waiting on each other to load and unload. Two people can work from opposite ends simultaneously.
Bulk material storage. If you are storing pallets, lumber, pipe, or large equipment, the 40ft gives you the floor space to keep things organized and accessible without stacking awkwardly.
Long projects. Over a rental that runs several months, the cost difference between a 20ft and 40ft is small relative to the operational benefit of having more room. You avoid the headache of running out of space mid-project.
Better value per square foot. The 40ft costs roughly $20 more per cycle than the 20ft but gives you twice the space. On a per-square-foot basis it is the more economical choice when you have room for it on site.

Three one-trip 40ft high cube containers ready for delivery. The extra length and height are visible compared to the standard height used unit on the right.

New one-trip containers only

Every container Bolted Box rents is a new one-trip high cube unit. We do not rent used containers. A one-trip container has made a single voyage from the factory, so it arrives in like-new condition with smooth-operating doors, no rust, no leaks, and a clean interior. That distinction matters more than most people expect before they receive a worn unit from a provider who mixes fleet ages.

One-trip container: like-new condition, uniform cream finish, smooth doors, weather-tight seal, clean floor

Used container: older fleet unit with potential for bent locking rods, worn door seals, surface rust, and misaligned hardware that creates real problems on an active site

On a customer-facing jobsite, a clean uniform container also reflects better on your operation than a dented, multi-colored box. On any site, a container with compromised seals puts your tools and materials at risk. All Bolted Box rentals are one-trip units inspected before delivery, so you know what is showing up before the truck rolls. For a deeper look at how condition affects pricing and what to watch for in a rental quote, see how much does it cost to rent a 40ft storage container.

Four questions to help you decide

If you are still unsure after looking at the specs, these four questions usually settle it:

How much are you actually storing? Take a rough inventory of what goes in the container. Tools and hand equipment for a small crew fit easily in a 20ft. Full pallets of material, large equipment, or supplies for multiple trades almost always want a 40ft.
How much site space do you have? A 20ft needs about 60 feet of backing room and a 40ft needs about 100 feet. If your site is constrained, that may make the decision for you. Both need solid level ground and a clear overhead path.
How long is the project? Longer rentals favor the 40ft since the cost difference per cycle is small and you avoid the operational friction of a container that is too small. Shorter projects on tighter budgets often favor the 20ft.
How many people need access? A single crew supervisor works fine in a 20ft. Multiple crews sharing a container, or a site where several people need simultaneous access, works better with the longer unit.

If you want a second opinion before ordering, call the team at (317) 606-2658 and describe your site and project. We can usually give you a clear recommendation in a few minutes. For more on how containers are used on active construction sites, see what are some common uses for shipping containers on construction sites. For a look at the portable benefits of on-site storage versus off-site alternatives, see what are the benefits of using portable storage containers over traditional storage units.

What the interior looks like

Both the 20ft and 40ft containers arrive with the same high cube interior clearance of roughly 8 feet 10 inches, clean corrugated steel walls, smooth flooring, and double cargo doors at the rear with multi-point locking rods. The welded steel lockbox on the door hardware shields your padlock from bolt cutters and tampering. Ground-level placement means no steps, no ramps, and no setup before your crew can start loading.

Inside a new one-trip 40ft container: clean walls, smooth flooring, and nearly 40 feet of usable interior length visible from the door.

Delivery is handled by a tilt-bed truck that places the container directly on the ground at your site. Once the truck pulls away the container is ready to use, with no assembly, no installation crew, and no extra equipment required. Quote accepted, delivery scheduled, container placed. That is the full process from order to ready.