CBM Calculator

How to read CBM and chargeable weight

Your CBM figure shows how much space the cargo needs. It is not what you pay. Freight is billed on chargeable weight. Carriers compare your actual weight with a volume-based weight. The higher figure becomes the basis, often written as W/M.

Air and ocean read the same boxes differently. Each mode converts volume into weight with its own factor. Air converts more aggressively, so light but bulky cargo gets an air figure far above its scale weight. Ocean leans on volume, so space usually drives the charge there. That is why the tool shows separate air and ocean results.

Use the container fit as a planning signal. If your volume fills only a small share of a container, consolidation through LCL usually plans better. If the load fills most of a container, pricing an FCL option makes sense. The right call depends on your goods, packaging and route, so treat the result as a starting point, not an offer.

• The higher of actual weight and volumetric weight drives the freight line.
• Dense cargo tends to bill by weight; light, bulky cargo bills by volume.
• The container fit is planning guidance, not a booking or a rate.

Turn the CBM result into a comparable quote

The result gives you the facts every forwarder asks for first. Send the total CBM, the gross weight and the package count with dimensions. Add the goods, the packaging, whether the cargo stacks, and any special handling. Then state the origin, the destination, the Incoterm and the cargo-ready date. When every provider prices the same facts, the replies become comparable.

Ask each reply to arrive itemized. Origin charges, the freight leg, surcharges such as BAF, destination charges such as THC, customs and delivery should each show as a line. Confirm the W/M basis, the minimum charge, the currency and the validity date. Check what the quote excludes before you compare totals. The lowest headline rate is not always the lowest all-in cost.

• Send the same CBM, weight and cargo facts in every request.
• Ask for the W/M basis, minimum charge and validity in writing.
• Compare the all-in total, not the headline freight rate alone.