The cost of air transportation depends not only on the weight on the scale. Light but bulky cargo takes up more space, so airlines compare actual and volumetric weight and usually use the larger one as an estimate.
Volumetric weight logic
The length, width and height of the box are multiplied, then the volume is divided by the carrier coefficient. The coefficient is specified by route and airline; For preliminary calculations, a divisor of 6000 for cubic centimeters is often used.
Simple example
A box of 100 × 80 × 60 cm has a volume of 480,000 cubic centimeters. With a divider of 6000, the volumetric weight is 80 kg. If the actual weight is 55 kg, the preliminary tariff can be calculated at 80 kg.
Several boxes
The volumetric weight of each box is calculated separately and summed up. For identical boxes, the result can be multiplied by the quantity. Actual external dimensions after packaging are used.
How does the pallet affect?
Palletizing may increase the overall size and design weight, but may be necessary for safety and security. Packaging decisions should not be made solely for the sake of tariff reduction.
Exact request
Indicate the number of pieces, actual weight and three dimensions of each piece, product description, pickup address, destination airport and ready date. The danger and temperature conditions must be reported immediately.
Apply the calculation to a real query
For a correct calculation, please indicate three external dimensions and the actual weight of each individual piece in your request for air transportation. Additionally, you need the pick-up address, airport or final address, description of the product, cost, batteries or hazardous properties, date of readiness and deadline for acceptance.
To avoid losing important parameters, use price request checklist. Estimated weight is only one factor: the final quote also depends on the route, flight availability, airline regulations, packaging, paperwork, customs, insurance and last mile.
Calculate volume and preliminary paid weight online
Enter the length, width, height, number of seats and actual weight in cargo calculation calculatorto obtain the volume in m³, volumetric and preliminary chargeable weight. The final charged weight is determined by the divisor, rounding and airline minimums.
Why the divisor depends on the transport mode
The volumetric formula is always the same (length × width × height / divisor), but the divisor changes by mode. Air freight follows IATA practice with a 1:6 ratio, i.e. a divisor of 6000 for centimetres (1 m³ ≈ 167 kg). Express couriers often apply 5000 (1 m³ ≈ 200 kg). Road LTL groupage commonly uses 3000 (1 m³ ≈ 333 kg), while sea LCL applies the “weight or measure” rule of 1 m³ = 1000 kg. The same carton can have a chargeable weight of 80 kg by air and 160 kg by road, so always confirm the divisor when comparing quotes.
Chargeable weight and minimum charges
Chargeable weight is the greater of actual and volumetric weight; airlines usually round it up to the nearest 0.5 kg. A minimum chargeable weight or minimum charge may also apply per shipment, so a per-kilogram rate does not reflect the real cost of very small parcels. Rate classes (general cargo, specific commodity rates, dangerous goods) and weight breaks (45 kg, 100 kg, 300 kg and so on) also change the price per kilogram.
Pallet example
Cargo stacked 100 cm high on a standard Euro pallet (120 × 80 cm): 120 × 80 × 100 = 960,000 cm³. With a 6000 divisor for air the volumetric weight is 160 kg, 192 kg with a 5000 courier divisor and 320 kg with a 3000 road LTL divisor. If the actual weight is 120 kg, all three modes charge on volumetric weight. Non-stackable cargo may be rated by some operators at the full loading height of the vehicle.
How to reduce volumetric weight
- Match carton size to the product; empty space is billed as volumetric weight.
- Choose stackable packaging and standard pallet footprints where possible.
- Check how consolidating several small pieces into one affects the overall dimensions.
- For bulky but non-urgent cargo compare road freight or sea LCL.
Frequently asked questions
Are volumetric and chargeable weight the same?
No. Volumetric weight is calculated from dimensions; chargeable weight is the greater of actual and volumetric weight and is the figure the rate applies to.
Is the 6000 divisor the same for every airline?
Most airlines use 6000, but some operators and charter movements apply a different ratio. The divisor should be stated in the written quote.
How should dimensions be measured?
Measure after packing between the outermost external points, including protrusions and the pallet, and round centimetres up.
