CBM and Chargeable Weight: Freight Calculation Guide

How to calculate CBM

Convert each outer dimension to metres and multiply length × width × height. Then multiply by the number of identical packages. Twelve cartons measuring 60 × 40 × 50 cm equal 0.60 × 0.40 × 0.50 × 12 = 1.44 CBM.

Actual weight and volumetric weight

Actual weight is what the packed cargo weighs on a scale. Volumetric weight converts the space occupied into a weight equivalent. For air cargo, a common calculation uses centimetres divided by a factor such as 6,000, but the applicable factor must be confirmed for the service.

One carton measuring 60 × 40 × 50 cm gives 60 × 40 × 50 ÷ 6,000 = 20 kg volumetric weight. If the carton actually weighs 18 kg, the example chargeable weight is 20 kg.

How LCL weight/measure pricing works

LCL quotes may use weight or measurement (W/M), charging the greater revenue unit under the route rule. A shipment of 1.44 CBM and 216 kg may therefore be rated by volume if one CBM is compared with one metric tonne. Minimum charges and origin or destination handling still apply.

Pallets change the answer

If cartons are placed on a pallet, measure the complete pallet including overhang and total height. Add pallet weight to the gross weight. A small amount of unused space around cartons can increase both CBM and air volumetric weight, so request final warehouse measurements.

Send these numbers for an accurate quote

• Number and type of packages.
• Outer length, width and height of each package type.
• Gross weight per package and total gross weight.
• Whether cargo is stackable, palletised or oversized.
• Any planned repacking before export.