20ft vs 40ft Container: Which One Is Right for Your Shipment?
Choosing between a 20ft and a 40ft container sounds simple, but it has a direct impact on your shipping costs. Pick a container that's too big and you pay for space you don't use. Pick one that's too small and you'll have to split the load or leave goods for the next sailing.
In this article we cover the dimensions and capacity of each container, the question to ask before you choose, and the most common mistakes when booking a full container load (FCL).
Container dimensions and capacity
These are the approximate interior dimensions of the three most common dry containers. They can vary slightly by carrier and manufacturer.
Container | Interior length | Interior width | Interior height | Approx. volume |
20ft standard | 19'4" | 7'8" | 7'10" | 1,170 cu ft |
40ft standard | 39'5" | 7'8" | 7'10" | 2,390 cu ft |
40ft High Cube | 39'5" | 7'8" | 8'10" | 2,690 cu ft |
A 40ft High Cube has the same length and width as a standard 40ft, but it's about one foot taller. That extra height makes a real difference for tall or bulky cargo.
Weight or volume? The question that decides
Before you look at dimensions, ask yourself: is your cargo heavy, or is it bulky?
Heavy, dense cargo hits the weight limit before it fills the space. A bigger container won't let you ship more.
Light, bulky cargo fills the space long before it reaches the weight limit. Every extra cubic foot counts.
How much weight a container can carry doesn't depend only on the box. The carrier and road weight rules at origin and destination also apply, so always confirm it when you request a quote.
When a 20ft container makes sense
A 20ft is usually the best choice for dense goods such as machinery, building materials, metals, beverages or packaged chemicals. It's also practical when your order doesn't justify a 40ft, or when the delivery site has limited space to maneuver.
When to choose a 40ft or a 40ft High Cube
A 40ft is built for light, bulky goods: textiles, furniture, appliances or consumer products. A 40ft rarely costs twice as much as a 20ft, so the cost per cubic foot is usually lower.
If your cargo is tall (furniture, mattresses, large but light equipment) or stacks well, a 40ft High Cube gives you that extra space without changing container type.
3 common mistakes when choosing a container
Not measuring the cargo properly. Estimating volume by eye leads to running short or overpaying. Measure your packages or ask your supplier for a packing list with dimensions.
Forgetting packaging and pallets. Pallets, boxes and gaps between packages take up space. Cargo never fills 100% of the interior volume. Learn more in our guide to international packaging.
Comparing only the price per container. What matters is what you pay per cubic foot shipped. A more expensive 40ft can be cheaper per unit.
Frequently asked questions
How many cubic feet fit in a 40ft container?
A standard 40ft has about 2,390 cu ft of interior volume, and a 40ft High Cube about 2,690 cu ft. Usable space is lower once packaging and gaps are taken into account.
What's the difference between a 40ft and a 40ft High Cube?
They have the same length and width, but the High Cube is about one foot taller. It's ideal for bulky cargo or goods that stack well.
How many pallets fit in a 20ft container?
It depends on pallet size and how they're loaded. As a guide, a 20ft holds about 10 standard 48" × 40" pallets on a single level. A 40ft holds roughly twice as many.
We'll help you choose
Not sure which container you need? Tell us what you're shipping, its approximate volume and weight, and we'll recommend the right container and prepare an all-in quote. You can also check our Q4 2026 rates from the US to Central America.
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