Air Chargeable Weight

6,000 is the IATA-standard volumetric divisor for air cargo, chosen to approximate the density at which a shipment starts costing an airline more in space than it earns in revenue per kilo. Cargo denser than roughly 167 kg/m³ gets billed on gross weight instead, since volume stops being the binding constraint at that point.

Both measure the same thing — volumetric weight — but courier and express networks (like parcel carriers) use a lower divisor of 5,000, which produces a higher volumetric weight for the same dimensions. That reflects their smaller aircraft and vehicles, where cubic space is scarcer per shipment, so bulky-but-light parcels get billed more heavily than they would under standard air cargo rules.

Gross weight is what your shipment weighs on a scale. Dimensional (volumetric) weight is a calculated figure based on the space it occupies. Carriers bill chargeable weight, which is simply the higher of the two — so a light, bulky shipment is billed on its volumetric weight, while a small, dense shipment is billed on its gross weight.

Pack tighter to shrink the outer dimensions — remove excess void space, use right-sized cartons instead of oversized ones, and avoid packaging that adds bulk without adding protection. Consolidating several small boxes into fewer, better-packed cartons often lowers total volume even when the gross weight stays the same, since dimensional weight is driven entirely by the outer envelope of each piece.

No — chargeable (volumetric) weight is an air and courier concept. LCL ocean freight uses a different mechanism, weight or measure (W/M): the forwarder charges per revenue ton, taking the greater of 1 tonne or 1 CBM for the shipment — use our CBM calculator to get that volume figure. FCL is different again: you pay a flat rate per container regardless of how it is packed, up to the box's maximum payload, so volume and weight only matter for choosing container size, not for pricing the box itself.