Sea Freight Chargeable Weight Calculator - Ocean LCL W/M
Answer: Sea freight chargeable weight for LCL is the higher of shipment CBM and metric tons: 1 CBM is treated as 1 revenue ton, equal to 1000 kg.
Sea freight chargeable weight for LCL is the higher of shipment CBM and actual metric tons, where 1 CBM equals 1 revenue ton or 1000 kg.
How the calculation works
Ocean LCL uses the W/M rule, meaning weight or measurement. First calculate packed volume in cubic meters. Then convert actual weight to metric tons by dividing kg by 1000. The billable revenue tons are:
billable revenue tons = max(total CBM, actual weight kg / 1000, minimum RT)
chargeable kg equivalent = billable revenue tons x 1000If your cargo is light and bulky, CBM wins. If your cargo is very dense, actual weight wins. Many LCL quotes also apply a 1.000 revenue-ton minimum even when the measured shipment is smaller.
FAQ
What is chargeable weight in sea freight?
For ocean LCL, chargeable weight is the revenue-ton equivalent used for billing. One revenue ton is either 1 CBM or 1000 kg, whichever is larger.
What does W/M mean?
W/M means weight or measurement. The forwarder compares the shipment’s cubic meters against its metric tons and charges the larger value.
Is sea freight chargeable weight the same as air freight chargeable weight?
No. Air freight usually uses volumetric weight = cubic centimeters divided by 6000. Ocean LCL uses 1 CBM = 1000 kg, which is much more forgiving for bulky cargo.
When does actual weight beat CBM in ocean freight?
Actual weight beats CBM when cargo density is above 1000 kg per CBM. Examples include metal parts, tile, stone, liquids, and dense hardware.
Why does my LCL quote show a 1 CBM minimum?
Small shipments still consume booking, warehouse, documentation, and consolidation work. Many forwarders apply a 1 CBM or 1 revenue-ton minimum to protect those fixed costs.
Does this calculator work for FCL containers?
No. Full container loads are normally priced per 20ft, 40ft, or 40HQ container, not by W/M revenue tons. Use W/M only for LCL and some breakbulk-style charges.
Should I use carton dimensions or pallet dimensions?
Use the outer dimensions that the warehouse will actually receive. If the shipment is palletized, use the full pallet footprint and height, including the pallet base.
Comparison
| Freight rule | Formula | Common use | Density threshold |
|---|---|---|---|
| Ocean LCL W/M | max(CBM, kg / 1000) | Less-than-container sea freight | 1000 kg/m3 |
| Air freight IATA | cm3 / 6000 vs actual kg | Airport-to-airport and forwarder air | 167 kg/m3 |
| Express courier | cm3 / 5000 vs actual kg | DHL, FedEx, UPS international express | 200 kg/m3 |
| Ocean FCL | Flat container rate | Full 20ft, 40ft, 40HQ containers | Payload limit, not W/M |
Dated facts
As of May 2026, ocean LCL quotes from China to the US still commonly use W/M revenue tons with 1 CBM = 1000 kg and a 1.000 RT minimum. Typical base ocean LCL linehaul on major China to US lanes is often quoted around 80 to 180 USD per CBM before origin CFS, destination CFS, customs, and delivery charges.
Frequently asked questions
- How is sea freight chargeable weight calculated?
- For ocean LCL, forwarders use W/M: compare cubic meters with metric tons. The larger number becomes the revenue tons used for freight billing.
- What does W/M mean in ocean freight?
- W/M means weight or measurement. One revenue ton is either 1 CBM or 1000 kg, whichever produces the higher billable amount.
- Does ocean LCL use volumetric weight like air freight?
- It uses a related but simpler rule. Ocean LCL treats 1 CBM as 1000 kg, while air freight commonly divides cubic centimeters by 6000.
- When does actual weight matter for sea freight?
- Actual weight matters when cargo density is above 1000 kg per CBM, such as metal parts, tiles, stone, liquids, or hardware.
- Why does the calculator include a minimum revenue ton?
- Many LCL forwarders quote a 1 CBM or 1 revenue-ton minimum. Small shipments may therefore bill at 1.000 RT even when the mathematical W/M value is lower.
- Is this the same as full container shipping?
- No. FCL is usually priced per container, not by revenue ton, unless payload or overweight restrictions are involved.