How is carton CBM calculated?

Convert carton length, width and height to metres, multiply the three dimensions, then multiply by the number of identical cartons.

Does carton CBM tell me how many cartons fit in a container?

Not by itself. CBM compares volume, but real loading also depends on carton orientation, internal dimensions, door openings, payload and unusable space.

Should I use internal or external carton dimensions?

Use the packed outside dimensions because those are the dimensions that occupy shipping space.

Do I need an account to use this calculator?

No. CargoToolsHub calculators run in your browser and do not require a signup.

Should I verify the result before booking freight?

Yes. Use the result as a planning aid and verify carrier-specific rules, equipment limits, tariffs or contractual requirements before a critical shipment.

Carton CBM Calculator - Free Online Tool

This carton-focused CBM calculator is useful when a packing list gives carton dimensions and quantities but you need the shipment cube quickly.

How to use this calculator

Enter one carton’s packed outside dimensions and the total number of identical cartons. If you have several carton sizes, calculate each size separately and add the CBM totals.

Formula and method

Carton CBM = length in metres × width in metres × height in metres × quantity.

Worked example

A 50 × 40 × 30 cm carton equals 0.06 m³. A shipment of 24 cartons therefore has a calculated volume of 1.44 m³.

What to check before you ship

Do not round dimensions too early. Measure bulges, protective corners and other projections when they increase the actual outside size presented for shipment.

Why the result matters

Accurate dimensions and weights help with quoting, space planning and avoiding preventable adjustments. Always use the packaged outside dimensions that will actually be tendered for transport, and verify any carrier-specific rules that affect billing or classification.

Carton CBM Calculator