Air freight bills on the greater of gross weight and volumetric weight. At the IATA factor of 6000, one cubic metre is treated as 167 kg, so anything lighter than 167 kg per cbm pays on volume.

Pieces

Line 1

Chargeable weight breakdown

Total pieces
4
Gross weight
368 kg
Volume
4.656 cbm
Volumetric weight (÷ 6000)
776.05 kg
Density
79.03 kg / cbm
Break-even density
166.67 kg / cbm

Charged on volume

788.5 chargeable kg

Exact figure 776.05 — freight $2,680.90

Rounding adds $42.33 (1.6%)

Every dimension is measured to the outermost point and rounded up to the next centimetre, then the chargeable kilo is rounded up to the next half kilo. Legitimate on a tariff that says so — an overcharge when it does not, and it repeats on every shipment.

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Indicative planning figures. Your air waybill or LCL tariff governs the actual dim factor, minimum charge and rounding rule.