CBM & Dimensional Weight Calculator – Air Freight & Container Packing Optimizer
What is CBM (Cubic Meters) in Global Logistics?
CBM (Cubic Meter) is the primary volumetric measurement used across international ocean freight and air cargo. One CBM is the volume of a cube measuring 1 meter in width, 1 meter in length, and 1 meter in height (1m × 1m × 1m = 1 m³ = 35.315 ft³).
Dimensional Volumetric Weight Explained
Carriers charge based on the greater of Actual Weight vs Dimensional (Volumetric) Weight. Light, bulky packages (e.g. pillows, empty luggage, footwear) consume valuable cargo aircraft holds without reaching weight limits. Airlines apply an international standard formula:
- Express Courier (DHL, FedEx, UPS): Volumetric Weight (kg) = (Length × Width × Height in cm) / 5000
- Standard Air Freight: Volumetric Weight (kg) = (Length × Width × Height in cm) / 6000
Ocean Container Packing Efficiency
Theoretical container volume cannot be 100% utilized due to door clearance, carton stacking gaps, and wooden pallet footprints. Experienced freight forwarders factor an 85% packing efficiency factor (28 CBM for 20GP, 58 CBM for 40GP, 68 CBM for 40HQ).
Frequently asked questions
What is the difference between Gross Weight and Billable Weight?
Gross weight is the physical weight on a scale. Billable weight is whichever is higher between gross weight and dimensional volumetric weight.
How does palletizing affect CBM?
Pallets add roughly 15 cm (6 inches) in height and 15–20 kg in tare weight per pallet, slightly reducing available carton volume in containers.
What is the DIM factor for sea shipping (LCL)?
Less-than-Container Load (LCL) freight follows a 1:1000 rule (1 CBM = 1,000 kg). Whichever is higher between CBM and metric tons determines freight charges.
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