How to Calculate CBM for Air Cargo

CBM means cubic meter. It measures cargo volume. In air freight, CBM is useful because bulky cargo may be charged by volumetric weight instead of actual gross weight.

CBM Formula

Length (m) × Width (m) × Height (m) = CBM

Example

Item	Value
Carton size	80 × 60 × 50 cm
Meter conversion	0.8 × 0.6 × 0.5 m
CBM	0.24 CBM

CBM to Volumetric Weight

For a common air freight divisor of 6000, 1 CBM is approximately 166.67 kg volumetric weight. This is why air freight can become expensive for large but light cartons.

Common Mistake

Many shippers send only total weight and package count. For air freight quotes, dimensions are also needed. Without dimensions, the quotation can change after the cargo is measured.

Indonesia Shipping Note

For cargo to or from Indonesia, CBM helps Ambara review the likely chargeable weight, pickup requirements, warehouse handling, and whether air freight is still practical for the shipment.

Checklist

Measure each carton after final packing
Use centimeters or meters consistently
Include pallets if the cargo will be palletized
Send photos if the cargo is irregularly shaped
Confirm whether dimensions are per carton or total

FAQ

Is CBM used only for sea freight?

No. CBM is common in sea freight, but it is also useful in air freight because it helps calculate volumetric weight.

Do I need dimensions for small cargo?

Yes. Even small cargo can have high volumetric weight if it is packed in a large box.