Shipping Cost Calculator
Calculate CBM and chargeable weight for air, express and sea freight before requesting a quote.
Air freight · Rated on the higher of actual weight and volumetric weight · volume divisor ÷ 6,000
Planning chargeable weight is the actual gross weight: 120.00 kg, higher than the 100.00 kg volumetric weight at ÷ 6,000.
Arithmetic: 600000 cm³ ÷ 6,000 = 100.00 kg volumetric · plus 120.00 kg actual · planning chargeable = higher of the two.
Rounded to 2 decimals for planning, over 1 carton type. Carriers may round up, apply a minimum chargeable weight or use a different contracted divisor — confirm the rule on your booking before relying on the figure.
Estimated Freight Cost
Check an approved China–USA Amazon FBA sea reference using these carton details. The FBA service uses its own per-piece and shipment minimums; the LCL W/M comparison above remains a separate planning metric.
Chargeable weight is the higher of actual weight and volumetric weight for air and express, or the higher of cubic metres and weight tonnage for sea LCL. FCL is rated per container. The divisor shown is the common convention; a contracted rate may use a different value. Cargo is re-measured after final packing, and the carrier or service rule that applies to your booking must be confirmed for the final charge.
Chargeable weight drives the freight charge.
Air freight is priced on the higher of two figures: the actual weight the cargo scales at, and a volumetric weight built from the carton dimensions. The higher figure is the chargeable weight.
Carriers compare both and rate the higher figure.
How is this calculated?
These are calculated metrics, not a final invoice. A calculated metric (CBM, volumetric weight and chargeable weight) is pure maths from the figures you enter; a planning estimate adds a first cost range from those metrics; a confirmed quote is only the charge agreed after measurements are verified and the service scope is fixed.
Calculation formulas
Volumetric weight = length × width × height × cartons ÷ divisor, with dimensions in centimetres. Air and express rate the higher of volumetric weight and actual gross weight. Sea LCL rates the higher of cubic metres and weight tonnage (W/M, 1 CBM = 1 revenue ton). FCL is rated per container, so no chargeable weight applies.
Unit conversion constants
1 in = 2.54 cm and 1 lb = 0.45359237 kg. Every dimension and weight is converted to centimetres and kilograms before the arithmetic runs, which is why switching the unit selector changes the labels but not the answer.
Volume divisors
The divisor is the number of cubic centimetres a carrier treats as one billed kilogram. 6,000 is the common air-freight convention and 5,000 the common express convention. The field accepts a contracted value, and the divisor actually in use is always printed next to the result.
Carrier measurement policy
Dimensions are taken on the outer carton as packed. Cargo is re-measured after final packing or repacking, and carriers may round up, apply a minimum chargeable weight or rate on a contracted divisor that differs from the convention shown here.
Freight rating limitations
CBM and weight comparisons are calculated metrics. A separate freight reference is returned only for an approved current China–USA Amazon FBA sea lane that matches the full carton details. Sales confirms final pricing, surcharges, taxes and delivery scope per shipment.
Calculation verification
The arithmetic is covered by an automated test suite that runs on every build: air, express, sea LCL and FCL cases, reversible unit conversion, mixed carton sizes, and the guard rails that reject impossible input instead of printing a figure.
Rating basis by mode