Revenue Ton (W/M): How LCL Sea Freight Is Actually Priced

An importer sends us two LCL shipments from Guangzhou in the same week. One is 2 cubic metres of light plastic housewares weighing 300 kg. The other is 2 cubic metres of ceramic tiles weighing 2,400 kg. The freight invoice charges the second one four times as much, even though both take up the same space in the consolidation box. The reason is a single pricing rule that governs almost all LCL and breakbulk sea freight: the revenue ton.

What a revenue ton is

A revenue ton — also called a freight ton, and written on quotes as W/M for “weight or measurement” — is the greater of the shipment’s volume in cubic metres or its weight in metric tons, where one revenue ton equals either 1 cubic metre or 1,000 kilograms. The carrier measures both, converts weight to tons, and charges you for whichever number is bigger.

The logic is that a ship is constrained by two things at once: the space in the hold and the weight the vessel can safely carry. Light bulky cargo fills the space before it reaches the weight limit; dense heavy cargo hits the weight limit while space is still free. Charging on the greater of the two means the carrier is paid for whichever constraint your cargo actually consumes.

Working the two examples

• Plastic housewares: 2 CBM, 300 kg. Volume = 2 revenue tons. Weight = 0.3 revenue tons. You are charged on 2 R/T — this is volumetric, or “light”, cargo.
• Ceramic tiles: 2 CBM, 2,400 kg. Volume = 2 revenue tons. Weight = 2.4 revenue tons. You are charged on 2.4 R/T — this is weight, or “heavy”, cargo.
• The break-even is 1,000 kg per cubic metre. Below that density, volume decides your freight; above it, weight decides.

So before you ship LCL, work out your cargo’s density. It tells you which lever — packing tighter, or reducing weight — will actually lower the bill.

How the numbers are measured

Volume is length by width by height of each package at its largest points, including the pallet and any protrusions, summed across the shipment. That is why loose, irregular packing costs more than a neat cubic carton of the same contents: the carrier measures the bounding box, not the goods. Weight is the actual gross weight including packaging and pallet. The forwarder’s CFS warehouse re-measures and re-weighs on receipt, and if their figures exceed what you declared, the invoice follows their figures.

Minimum charges and the 1 R/T floor

Almost every LCL tariff has a minimum of 1 revenue ton. A 0.3 CBM, 40 kg parcel is billed as if it were a full revenue ton. This is why very small LCL shipments have a terrible per-unit economics and why, below roughly 1.5 to 2 CBM, it is worth comparing LCL against courier or air — see sea freight versus courier for small shipments. There may also be minimums on individual line items like the bill of lading fee.

Charges that ride on the revenue ton

The ocean freight is only the first line. At both ends, several handling charges are also quoted per revenue ton: origin CFS or consolidation charges, destination CFS and de-stuffing, sometimes terminal handling and documentation. A quote that looks cheap on the ocean rate can be expensive once the per-R/T destination charges are added, so always ask for the all-in figure per revenue ton, origin to nominated Chattogram CFS. For the wider picture see how sea freight rates are calculated and what happens inside the consolidation warehouse.

When the rule changes: FCL and chargeable weight

The revenue ton governs LCL and breakbulk. Once you fill a full container, you switch to a flat box rate and the W/M calculation disappears — which is part of why cargo approaching a container-load is often cheaper as FCL even if you do not quite fill it. Air freight uses a related but different idea, volumetric or chargeable weight, with a different conversion factor — covered in air freight chargeable weight. And consolidating several small parcels into one LCL shipment spreads the 1 R/T minimums — see cargo consolidation for small importers.

Measuring and declaring your cargo correctly

The forwarder charges on the figures its CFS warehouse records, so the declaration you give at booking is a forecast, not the final word. Measure each package at its largest points — length, width and height including the pallet, banding and any overhang — and take the actual gross weight with packaging. Sum the volumes, convert the weight to tons, and quote the larger. If your declared figures are well under what the warehouse finds, the invoice is revised up and you have lost the ability to plan. If you genuinely cannot measure precisely, declare on the high side and reconcile, rather than being surprised.

Reducing your revenue-ton count: what works

• For light cargo (under 1,000 kg per cubic metre), volume is your bill. Tighter packing, right-sized cartons, knock-down or nested packing and removing dead space in the master carton all cut cost directly. Flattening a bulky item can move it below a revenue-ton boundary.
• For heavy cargo (over 1,000 kg per cubic metre), weight is your bill and repacking does nothing. Here the lever is consolidation or moving up to FCL, where a flat box rate replaces the per-ton charge.
• Do not ship near-empty space. Below roughly 1.5 to 2 revenue tons the 1 R/T minimum and fixed fees dominate; consolidate with another order or compare against air chargeable weight.

Reading an LCL rate sheet

An LCL quote is rarely one number. Expect: ocean freight per revenue ton; an origin charge per revenue ton for consolidation and the CFS at the China end; a bill of lading or documentation fee, often flat; destination CFS and de-stuffing per revenue ton at the nominated Chattogram depot; and possibly terminal handling. Multiply every per-R/T line by your cargo’s revenue-ton figure, add the flat fees, and only then compare two forwarders. A low ocean rate paired with high destination per-R/T charges frequently loses to a higher ocean rate with lean destination charges. Always ask for the all-in figure per revenue ton, door of supplier or origin CFS to the Chattogram CFS. See how sea freight rates are calculated.

Breakbulk and project cargo

The revenue ton is not only an LCL idea. Breakbulk cargo — machinery, steel, oversized items shipped loose rather than in a container — is also quoted on the greater of weight or measurement, with the same 1 CBM or 1,000 kg equivalence, plus lift charges for heavy pieces. For a single heavy machine the weight almost always governs; for a large light structure the measurement does. Either way, the W/M principle tells you which dimension of your cargo is costing you the money. See break bulk cargo shipping and cargo consolidation.

Quick reference: is my cargo light or heavy?

Divide your shipment’s gross weight in kilograms by its total volume in cubic metres. Below 1,000, it is volumetric cargo and volume sets your freight — typical of plastic housewares, garments, toys, foam products, empty bottles, lampshades. Above 1,000, it is weight cargo and repacking will not help — typical of tiles, stone, machine parts, hardware, liquids in glass, batteries, tinned goods. Right on the line, small packing changes can tip you either way, so it is worth measuring carefully. Do this calculation before you choose LCL, FCL or air, because it tells you which cost lever your cargo actually responds to.

DE International moves cargo between China and Bangladesh by sea and air, arranges the container, books the space and clears it through Chattogram — and we will tell you plainly which option fits your shipment rather than selling you the biggest one. Send us your cargo details for a quote built around your actual volume: contact us, see our services, use the China sourcing & buying agent service, or browse the shop.