Is one 40ft cheaper than two 20ft containers?

Usually yes — one 40ft is cheaper on freight and handling than two 20ft. But if cargo is heavy enough to hit the 40ft's weight limit first, you may still need two 20ft.

Is there a big freight difference between 40ft and 40ft HC?

Usually not. Only the height differs and handling is the same, so the surcharge is typically small — for bulky cargo, HC is often better value per CBM.

Container Choice

20ft vs 40ft — which container
should you pick?

Container choice usually comes down to one question: does your cargo hit the weight limit first, or the volume limit? This page turns that judgment call into numbers.

Short answer — heavy, dense cargo (machinery, steel, stone) is better suited to 20ft; light, bulky cargo (apparel, appliances, packaging) is better suited to 40ft / 40ft HC. A 40ft has more than double the volume of a 20ft but a similar max payload.

Quick comparison

20ft, 40ft and 40ft HC side by side

Standard dry container comparison — figures are representative and vary by carrier/manufacturer.
Spec	20ft Standard	40ft Standard	40ft HC
Internal volume	33.1 CBM	67.5 CBM	76.0 CBM
Max payload	~21.7 t	~26.7 t	~26.5 t
Freight (relative)	Baseline	~1.5× a 20ft	Similar to 40ft
Best for	Heavy, dense cargo	Light, bulky cargo	Bulky, tall cargo

The rule of thumb: cargo density

A quick kg ÷ CBM check

The most practical yardstick is cargo density (kg/CBM). If your cargo is denser than the container's own "max payload ÷ volume" ratio, weight fills up first and 20ft wins; if it's lighter, space runs out first and 40ft wins.

Cargo density = total weight (kg) ÷ total volume (CBM)

A 20ft's baseline density is roughly 21,700 ÷ 33.1 ≈ 655 kg/CBM.
If your cargo is denser than that (e.g. steel, tile) 20ft is usually more economical; lighter (e.g. apparel, furniture) usually favors 40ft.

Recommendations by situation

Choose 20ft when…

Cargo is heavy and dense, volume is too small to fill a 40ft, or you're routing through roads with strict axle-weight limits.

Choose 40ft when…

Cargo is light and bulky, or volume is high enough that one 40ft beats two 20ft on freight and handling cost.

Choose 40ft HC when…

A 40ft still falls short on height. The extra ~30cm of height adds roughly 13% more volume.

For heavy cargo, think about how it comes off

With dense cargo the choice is not only about freight rates. Load 26 tonnes into a 20ft and the box itself is within spec, but you may still run into road weight limits at destination or the rated capacity of the handling equipment.

This matters most for machinery and plant, where a single piece is heavy and has to be lifted by crane or forklift. What fits inside a container and what can be lifted safely are two different numbers, governed by different limits. Splitting the weight across two boxes costs more in freight, but it can take real risk out of the discharge — which is worth pricing in before you book.

See exactly how many units fit

Enter your cargo dimensions and the calculator compares piece count and load rate across 20ft, 40ft and 40ft HC automatically.

Open the Loading Simulator

FAQ

Common questions about container choice

Which is cheaper — two 20ft or one 40ft?

One 40ft is usually cheaper than two 20ft on freight and handling. But if your cargo is heavy enough to hit the 40ft's weight limit first, two 20ft may be necessary.

Is the freight gap between 40ft and 40ft HC large?

Usually not. Only the height differs and handling is identical, so the surcharge tends to be small — bulky cargo often gets better value per CBM from the HC.

Density math is a hassle — is there an easier way?

Enter your cargo into the loading calculator and it instantly shows volume and weight load rates for 20ft, 40ft and 40ft HC side by side, so you can see which one fills up first at a glance.

20ft vs 40ft — which containershould you pick?