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Chargeable weight is the figure your freight is actually billed on, and it is not what your scale says. On ocean LCL the rule is weight or measure, written W/M: the carrier charges on whichever produces the greater number. Getting this right before booking is the difference between an accurate budget and an amended invoice.
The ocean calculation
The pivot for ocean freight is one cubic metre against one metric ton, so:
- Measure each piece in centimetres, including the pallet and any overhang.
- Volume in cubic metres = length x width x height, divided by 1,000,000.
- Compare total cubic metres with total weight in metric tons.
- The higher number is the chargeable figure, subject to the minimum in the tariff.
Worked example. Four pallets, each 120 x 100 x 150 cm, each weighing 320 kg.
- Volume per pallet: 120 x 100 x 150 = 1,800,000 cm3, divided by 1,000,000 = 1.8 cbm
- Total volume: 7.2 cbm
- Total weight: 1,280 kg, which is 1.28 metric tons
- Chargeable: 7.2, because volume exceeds weight
This shipment pays on 7.2 units. To be charged on weight instead, the same four pallets would need to weigh more than 7.2 tons, which is 1,800 kg per pallet, a density that only dense cargo such as steel, tile or machinery parts reaches. Palletised consumer goods stay far below it, which is why consumer LCL freight is volume driven.
A weight-driven example
Two pallets of ceramic tile, each 120 x 100 x 100 cm and each weighing 1,100 kg.
- Volume per pallet: 120 x 100 x 100 = 1,200,000 cm3 = 1.2 cbm
- Total volume: 2.4 cbm
- Total weight: 2,200 kg = 2.2 metric tons
- Chargeable: 2.4, because volume still exceeds weight by a small margin
Raise each pallet to 1,400 kg and the weight becomes 2.8 tons against 2.4 cbm, so the shipment is billed on 2.8. The break-even density is 1,000 kg per cbm: cargo denser than that is billed on weight, cargo lighter than that is billed on volume.
A quick density test
Divide total kilograms by total cubic metres. A result below 1,000 means volume governs and the number to cut is cubic metres. A result above 1,000 means weight governs and repacking will not lower the bill. The first example measures 1,280 kg over 7.2 cbm, which is 178 kg per cbm, far below the pivot. The tile example measures 2,200 kg over 2.4 cbm, which is 917 kg per cbm, close to the pivot.
Why the pallet counts
Measurement is taken over the outside of the shipment as presented, including the pallet base and anything protruding. A 15 cm pallet under a 135 cm stack adds cubic metres to the bill. Overhang is measured too, and it also risks handling damage. Repalletising to a tighter footprint is the cheapest freight saving available.
The dimensional weight comparison in air freight
Air freight uses a volumetric divisor rather than the cubic metre against ton pivot. The standard conversion divides the volume in cubic centimetres by 6,000 to obtain a kilogram equivalent, then charges on the greater of that and the actual weight. That divisor equals 167 kg per cubic metre, against 1,000 kg per cubic metre in the ocean pivot, so light bulky cargo pays on volume at a much lower density in air than by sea.
The four pallets from the first example total 7,200,000 cm3. Divided by 6,000, that is 1,200 kg of volumetric weight against 1,280 kg actual, so air bills the actual weight. A pallet of the same size holding 150 kg of finished garments bills at 300 kg volumetric (1,800,000 / 6,000), twice its real weight.
| Mode | Pivot | Effect on light cargo |
|---|---|---|
| Ocean LCL | 1 cbm against 1 metric ton (1,000 kg per cbm) | Volume governs for cargo lighter than 1,000 kg per cbm |
| Air | Volume in cm3 divided by 6,000 (167 kg per cbm) | Volumetric weight governs for cargo lighter than 167 kg per cbm |
The quote basis: 5 cbm and 1,500 kg
Our Miami LCL quotes are built on a reference shipment of 5 cbm and 1,500 kg. Because 1,500 kg is 1.5 metric tons, volume governs: the chargeable figure is 5. The total below is the quoted price for that reference shipment from Miami on FCA terms, with the transit time from Miami to the port of discharge.
| Miami to | 5 cbm / 1,500 kg total (USD) | Transit (days) |
|---|---|---|
| Dominican Republic | 635 | 3 |
| Puerto Rico | 705 | 3 |
| Barbados | 795 | 6 |
| Jamaica | 1,000 | 4 |
| Grand Cayman | 1,230 | 5 |
A shipment that measures 4 cbm and 1,500 kg is billed on 4, and one that measures 5 cbm and 6,000 kg is billed on 6. The quote changes only when the chargeable figure changes, which is why measured dimensions matter more than the scale. For what else moves the number, see what drives LCL shipping costs.
The same 5 cbm from other origins
The reference shipment is also quoted from consolidation points outside Miami. The chargeable figure stays at 5 cbm, and the origin changes the total and the transit time.
| Destination | From Miami | From Shanghai | From Shenzhen |
|---|---|---|---|
| Dominican Republic | $635 (3 days) | $2,140 (21 days) | $2,175 (38 days) |
| Barbados | $795 (6 days) | $2,320 (24 days) | $2,350 (41 days) |
| Trinidad | $985 (8 days) | $2,535 (26 days) | $2,570 (43 days) |
| Jamaica | $1,000 (4 days) | $2,550 (22 days) | $2,585 (39 days) |
Where the figure is verified
The consolidator remeasures and reweighs at the container freight station. Those figures, not yours, go on the invoice and on the manifest. Declaring optimistic dimensions does not save money, it produces a corrected invoice after the cargo has sailed and, if weights are involved, a mismatch with the verified gross mass declaration required for FCL loading.
The same figures feed the customs data. Under 19 CFR 141.86 the commercial invoice must give quantities and state what merchandise is in each package, and the cargo declaration filed through AMS carries weights and piece counts. Weights that differ between the invoice, the packing list and the manifest trigger questions at the terminal. The commercial invoice requirements cover how the two documents line up.
Unit conversions that avoid billing errors
Dimensions from US suppliers arrive in inches and pounds, and the tariff is in metric units. Convert before you compare:
- 1 inch = 2.54 cm, so a 48 x 40 x 60 inch pallet is 121.9 x 101.6 x 152.4 cm.
- 1 cubic metre = 35.31 cubic feet, so a 100 cubic foot shipment is 2.83 cbm.
- 1 metric ton = 1,000 kg = 2,204.6 lb, so a 3,000 lb shipment is 1.36 metric tons.
Round volume up to the next 0.01 cbm and weight up to the next kilogram, because the consolidator's measurement is the one invoiced. A standard 48 x 40 inch pallet stacked 60 inches high measures 1.89 cbm, not the 1.51 cbm that a 48 x 40 x 48 inch stack gives. Twelve inches of stack height adds 0.38 cbm to the pallet.
Practical steps that lower the chargeable figure
- Reduce carton dimensions before reducing carton count. Volume compounds in three dimensions.
- Stack to a standard pallet height rather than leaving a partially loaded top layer.
- Remove display packaging designed for shelves, not ships.
- Consolidate two small shipments into one to clear the minimum charge once instead of twice.
- Read the tariff's pivot line before booking, because the tariff, not the trade lane, states the ratio the carrier applies.
More cost levers are in how LCL container shipping works, and if your volume is growing, compare against a full container using LCL vs FCL for US exports.
How to measure a shipment before booking
- Measure each handling unit after it is wrapped and strapped, because stretch wrap and corner boards add centimetres.
- Take length, width and height at the widest, longest and tallest points, so a pallet with a cylinder on top is measured as a rectangular block.
- Weigh the whole unit, pallet and packaging included. The gross weight on the packing list has to match.
- Record piece count, dimensions and gross weight per unit on the packing list, as packing list requirements describe, so the consolidator's remeasurement can be compared line by line.
- Calculate cbm and tons for the whole shipment and find the governing figure before asking for a quote.
FAQ
What is chargeable weight in ocean freight?
The greater of the shipment's volume in cubic metres and its weight in metric tons, used as the billing unit for LCL. One cubic metre is equated to one metric ton, so cargo denser than 1,000 kg per cbm is billed on weight.
How do I calculate cubic metres?
Multiply length by width by height in centimetres and divide by 1,000,000. Include the pallet and any overhang. A 120 x 100 x 150 cm pallet is 1.8 cbm.
Is there a minimum charge?
Yes. The tariff states a minimum chargeable quantity, and a shipment smaller than the minimum is billed at the minimum. The quote shows the figure before you book.
Does FCL use chargeable weight?
No. Full containers are priced per container, subject to the container's payload and road weight limits.
How is air chargeable weight different?
Air divides volume in cubic centimetres by 6,000 to get volumetric kilograms and bills the greater of that and actual weight. The ocean pivot is 1,000 kg per cbm and the air pivot is 167 kg per cbm.
Why did my invoice differ from my calculation?
The consolidator measures the cargo as presented at the container freight station, including pallets and overhang, and bills on those figures. A shipment measured without the pallet base is understated by the base's volume.
At what density does weight start to govern?
At 1,000 kg per cbm. A shipment of 3 cbm that weighs 3,000 kg is exactly at the pivot, and every kilogram above that is billed as weight.
Are quotes based on chargeable weight?
Yes. Our Miami LCL quotes use a 5 cbm and 1,500 kg reference shipment, so the chargeable figure is 5 cbm. A shipment with a different chargeable figure gets a different total.
Want your dimensions checked before you book? Send the packing list and we will confirm the chargeable figure.
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