Prepare consistent measurements
List each package type with finished length, width, height, piece count, and gross weight. Keep dimensions and weight in the unit system required by the quote. For centimetres and kilograms, volumetric weight is often modelled by dividing cubic centimetres by 6,000, but the applicable contract may differ.
Compare shipment gross weight with shipment volumetric weight unless the forwarder applies rules at piece level. The higher basis normally becomes chargeable weight before minimums and rounding.
Avoid common quote errors
Do not mix net product weight with packed gross weight. Do not multiply dimensions by pieces twice. Do not round each intermediate cube unless the tariff requires it. Oversize pieces, non-stackable cargo, dangerous goods, and density minimums can create additional charges outside the formula.
- Photograph and measure the packed piece.
- Ask whether dimensions are rounded up.
- Confirm divisor, minimum, and pivot weight.
Use chargeable weight as a design signal
If volumetric weight consistently exceeds gross weight, prioritise cube reduction. If gross weight controls, a smaller carton may still improve handling but may not change the base air-freight charge. Test the saving against packaging and operational cost.
Working checklist
- ✓ Packed dimensions by piece type
- ✓ Total gross weight
- ✓ Divisor
- ✓ Rounding method
- ✓ Minimum charge
- ✓ Special handling rules