Sea Container Calculator

Compare cargo volume, weight and pallet count against common sea container planning capacities.

Volume (m³)Gross cargo weight (kg)Euro pallets

Container fit

20 ft

20 ft: fits
40 ft: fits
40 ft HC: fits

How to use this tool

Enter the required values in the labeled fields. Results update in your browser and are announced for assistive technologies. Use realistic measurements and verify important outcomes before acting on them.

Formula or logic

The tool checks volume, payload and pallet count against typical 20 ft, 40 ft and 40 ft high-cube values.

Example calculation

Example: 28 m³, 12,000 kg and 10 Euro pallets may fit a 20 ft container.

Practical use and limits

This page is built for planning freight, warehouse, courier or transport scenarios before confirming commercial terms with a carrier, forwarder or internal operations team. The calculation is intentionally visible and described above so you can sanity-check the result instead of treating it as a black box.

Limit: carrier rules, surcharges, legal requirements and real-world constraints can change the final answer. For important decisions, use this result as a planning aid and verify it against the relevant source of truth.

Last reviewed: May 29, 2026.

Sea Container Calculator: practical guide

Container fit is a three-way constraint: volume, payload and loading pattern. A shipment can look fine by cubic meters and still fail because of pallet orientation, door height, weight distribution or cargo that cannot be stacked.

Use this calculator before confirming ocean freight space or promising a container plan. The useful output is not just how many units fit, but which limit is binding and what needs checking before stuffing.

Real examples

Euro pallet export load

Input: standard pallets with carton overhang risk

Result: layout and door clearance matter as much as total CBM

Dense machinery parts

Input: low volume but heavy crates

Result: payload and floor loading can limit the container before space runs out

Loose cartons

Input: non-palletized cartons with mixed sizes

Result: stacking plan and crush risk decide the real usable volume

Practical notes

Check internal dimensions, door opening, payload and cargo weight distribution together.
20 ft containers often hit payload limits; 40 ft and 40 HC containers often hit volume or height limits.
Dunnage, lashing, pallets and air gaps reduce theoretical capacity.

Common mistakes

Using external container dimensions instead of internal dimensions.
Comparing only CBM while ignoring payload, door height and pallet layout.
Assuming cartons can be stacked to the roof without checking crush strength or unloading sequence.

Frequently asked questions

Is container loading only volume?

No. Payload, weight distribution, dimensions and lashing also matter.

Why can a 20 ft carry more dense cargo?

A 20 ft container often has high payload relative to its volume.

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