Learn/Pricing & Charges

CBM and the Revenue Ton (W/M): How Ocean LCL Is Priced

CBM (cubic metre) measures cargo volume: length × width × height in metres, summed across pieces. Ocean LCL freight is charged per revenue ton — 'weight or measure' (W/M) — meaning the greater of the cargo's weight in metric tonnes or its volume in CBM, with one CBM equated to 1,000 kg.

Calculating CBM and the W/M charge

Example: 8 pallets, each 1.2 m × 1.0 m × 1.4 m and 240 kg. Volume: 1.68 CBM × 8 = 13.44 CBM. Weight: 1.92 tonnes. Revenue tons = max(13.44, 1.92) = 13.44 — at a rate of $55 W/M, ocean freight is $739. Most general cargo is 'measure' cargo (volume governs); only dense goods like tiles, metals, or liquids flip to weight-based rating.

Two practical traps: LCL minimums (commonly 1 W/M — tiny shipments pay the minimum regardless), and the fact that origin/destination CFS charges, documentation, and delivery are also frequently rated per W/M — so the true LCL comparison is the all-in per-W/M cost, not the ocean rate alone.

The LCL-to-FCL break-even

Because LCL stacks per-W/M charges at every stage, there is a volume where a full container becomes cheaper even if you cannot fill it — commonly somewhere around 13–15 CBM against a 20' container (which stows roughly 25–28 CBM of usable space), though it moves with the lane and current rate levels. Every desk quoting LCL above ~10 CBM should be checking the FCL price in parallel; it is one of the easiest margin-and-service wins in forwarding, and one of the most commonly missed under time pressure.

Frequently Asked Questions

How do I calculate CBM?

Multiply length × width × height in metres for each piece, then sum. For cartons measured in centimetres, divide the cm³ result by 1,000,000. Always use outer packed dimensions, including pallets.

What does W/M mean on a freight quote?

'Weight or measure' — the charge applies per revenue ton, the greater of weight in metric tonnes or volume in CBM. A 3-tonne, 9-CBM shipment is billed on 9 revenue tons.

At what volume should I switch from LCL to FCL?

As a rule of thumb, compare seriously from about 10 CBM and expect FCL to win somewhere around 13–15 CBM on most lanes — plus FCL avoids CFS handling, reduces damage risk, and is usually faster. Always price both.

Is chargeable weight the same as revenue ton?

Same principle, different math. Air chargeable weight uses kg with a ÷6,000 volumetric formula; ocean W/M uses the greater of tonnes and CBM at a 1,000 kg/CBM equivalence. Don't mix the two conventions in one quote.