What is Chargeable Weight in International Shipping?
In global logistics and supply chain management, air and ocean freight carriers use a specific pricing mechanism known as Chargeable Weight. When shipping goods globally, you are billed on whichever value is greater: the Actual Gross Weight (how much it weighs on a scale) or the Volumetric / Dimensional Weight (how much space it occupies in the container or aircraft).
This rule prevents "light cargo" (such as flat-packed furniture, pillows, or large plastic components) from taking up massive physical space while paying very little based on weight alone.
How to Calculate Volumetric Weight (Air vs. Sea LCL)
Standard industry formulas vary significantly based on your shipping mode. If you are precision-manufacturing goods where dimensions are strictly in millimeters (mm) or centimeters (cm), understanding these ratios is critical for accurate freight quoting:
(L × W × H in cm) ÷ 5000
Standard ratio used by DHL, FedEx, UPS, and airlines.
1 CBM = 167 kg (or 1:6000)
Varies by destination. Heavy cargo surcharges apply if exceeded.
Standard Ocean Container Dimensions & CBM Capacity Reference
When planning your container loading optimization, use this verified baseline chart for standard shipping containers. Note that actual loading capacity usually reaches 85% to 90% of maximum volume due to carton stacking gaps:
| Container Type | Inner Dimensions (L x W x H) | Max Volume (CBM) | Practical Loading Max |
|---|---|---|---|
| 20ft Standard (20GP) | 5.89 x 2.35 x 2.39 m | 33.2 CBM | Approx. 28 - 30 CBM |
| 40ft Standard (40GP) | 12.03 x 2.35 x 2.39 m | 67.7 CBM | Approx. 58 - 62 CBM |
| 40ft High Cube (40HQ) | 12.03 x 2.35 x 2.69 m | 76.4 CBM | Approx. 68 - 70 CBM |
Frequently Asked Questions (FAQ)
Q1: Why does my freight forwarder bill me for more than my actual weight?
A: Your cargo is likely classified as "Volumetric Cargo" (or Light Cargo). Because your boxes take up a large physical space relative to their weight, the shipping carrier bills you based on the volume (CBM) converted to dimensional weight to compensate for space utilization.
Q2: How many mm are in a centimeter for shipping measurements?
A: There are exactly 10 millimeters (mm) in 1 centimeter (cm). If your factory packing list provides box dimensions in mm (e.g., 600mm x 400mm x 500mm), our calculator seamlessly converts them when you select Millimeters from the dropdown menu, saving you manual calculations.
Q3: How do I maximize space when shipping furniture or oversized cartons?
A: To optimize container loading density, utilize uniform carton sizing whenever possible. If you use standard US Pallets (1200x1000mm) or Euro Pallets (1200x800mm), design your product packaging dimensions to be modular fractions of the pallet surface to completely eliminate dead space.