Road Dimensional Weight

Road and courier networks commonly use a 5,000 divisor, lower than air cargo's standard 6,000, which produces a higher volumetric weight for identical dimensions. This broadly reflects that trucks and parcel networks have less cubic capacity per shipment relative to their payload than a wide-body aircraft, so bulky-but-light parcels get billed more heavily under road/courier rules. Some carriers still price road or express freight air-style using 6,000 — this tool lets you toggle between the two.

Both tools use the same underlying formula and the same "bill on the higher of gross or volumetric" rule — the difference is the divisor. The Air Chargeable Weight tool is fixed at the IATA-standard 6,000 for air cargo, while this tool lets you pick 5,000 or 6,000 to match whichever your road or express carrier actually applies.

Volumetric weight is volume divided by the divisor, so a smaller divisor produces a larger result for the exact same box. Dividing 640,000 cm³ by 5,000 gives 128 kg, while dividing the same volume by 6,000 gives only about 107 kg — the lower the divisor, the more a carrier is effectively charging for the space your cargo occupies rather than its actual mass.

No — dimensional (volumetric) weight billing is a road, courier, and air concept. LCL ocean freight uses a different mechanism called weight or measure (W/M): the forwarder charges per revenue ton, taking the greater of 1 tonne or 1 CBM. FCL ocean freight is priced as a flat rate per container instead, so neither uses a divisor-based dimensional weight figure.

Multiply each dimension by 2.54 before entering it — for example, 40 inches becomes 101.6 cm. Mixing inches and centimeters without converting is the most common reason a dimensional weight figure comes out far too high or low.