How air freight chargeable weight is calculated
Air cargo can be rated by physical gross weight or by volumetric weight. The shipment-level chargeable weight is generally based on whichever applicable weight is greater, subject to the carrier, tariff and rate agreement.
This calculator totals all package lines before comparing shipment gross weight with shipment volumetric weight. That makes it suitable for consignments containing multiple package sizes or quantities.
Air freight volumetric weight
In metric mode, the general air-freight reference used by default is 6,000 cubic centimeters per kilogram.
In imperial mode, the default is 166 cubic inches per pound.
Different carriers and services can use different dimensional factors. For example, express parcel services may use a factor different from general air freight. Enter the divisor stated in the applicable carrier rule, quotation or rate agreement.
Multi-piece air cargo example
Consider two packages, each measuring 120 × 80 × 50 cm and weighing 50 kg gross. Their total gross weight is 100 kg.
Using a divisor of 6,000, each package has 80 kg of volumetric weight, so the two-piece shipment has 160 kg of volumetric weight. Because 160 kg is greater than the 100 kg gross weight, 160 kg is the chargeable-weight basis before any additional applicable rating rules.
Dimension rounding
The default dimension-rounding option rounds each positive dimension to a whole centimeter or inch, with a fraction of 0.5 or greater rounded upward and a smaller fraction rounded downward.
You can switch to exact entered dimensions when that better matches the rule or quotation you are checking.
Chargeable-weight rounding
The calculator allows the final chargeable result to be rounded upward to the next 0.5 weight unit, the next whole unit, or left unrounded.
The default is the next 0.5 kg in metric mode and the next whole pound in imperial mode. Always use the rounding rule that applies to the shipment being rated.
Gross weight vs. volumetric weight
Gross weight is the physical weight of the cargo and its applicable packaging. Volumetric weight represents the amount of cargo space occupied relative to a dimensional factor.
Dense cargo is more likely to be rated from gross weight, while relatively light cargo occupying substantial space can be rated from volumetric weight.
Calculate CBM at the same time
The calculator also reports total cubic meters for the complete shipment. If you only need shipment volume without chargeable-weight calculations, use the CBM Calculator.
Difference from the Dimensional Weight Calculator
The Dimensional Weight Calculator provides a quick calculation for a single package. This Air Freight Chargeable Weight Calculator is designed for shipment-level work: multiple package types, quantities, metric or imperial units, dimension rounding, final weight rounding, CBM and an optional freight-rate estimate.
Air freight rating can also depend on tariffs, minimum charges, higher weight breaks, positional weight, special cargo rules, route-specific agreements and other carrier conditions. Confirm the final chargeable weight and rate with the airline, forwarder or applicable tariff.
Frequently asked questions
Is air freight always divided by 6,000?
No. 6,000 cm³/kg is a common general air-freight reference, but carrier and service rules can differ. The divisor in this calculator is editable.
Can I enter different package sizes in one shipment?
Yes. Add a package type for each different combination of dimensions, quantity and gross weight per piece.
Is chargeable weight calculated per piece or for the shipment?
This calculator totals gross and volumetric weight across all entered package lines and then compares the shipment totals. Line-level results are also shown for reference.
Does the calculator show CBM?
Yes. Total shipment volume is reported in cubic meters, with cubic feet also shown.
Can I estimate freight cost?
Yes. Enter an optional rate per chargeable kilogram or pound. The calculator multiplies that rate by the rounded chargeable weight. It does not add surcharges, minimum charges, taxes or other fees.
Using this calculator effectively
The Air Freight Chargeable Weight Calculator builds a shipment from multiple package types and compares total gross weight with total volumetric weight. It supports quantities, metric or imperial units, configurable dimensional factors, rounding rules, CBM and an optional freight-rate estimate.
Common uses
- Calculating shipment-level chargeable weight for air cargo containing multiple package sizes or quantities.
- Comparing total gross weight with volumetric weight before requesting or checking an air-freight quotation.
- Testing different dimensional factors and rounding rules when a carrier or rate agreement specifies particular rating conditions.
Tips for a better estimate
- Use the greatest measured length, width and height required by the applicable carrier rule and enter each different package type separately.
- Confirm the dimensional divisor and rounding method from the airline, forwarder, tariff or quotation instead of assuming the default applies to every shipment.
- Remember that minimum charges, weight breaks, positional weight, special cargo rules and surcharges can affect the final freight rating beyond this calculation.
Related calculations
Dimensional Weight Calculator · LCL Chargeable Volume Calculator · CBM Calculator