When requesting an international freight quote, you may come across terms such as
Light cargo
Bulky cargo
Heavy cargo
These terms describe the relationship between the physical weight of a shipment and the amount of space it occupies.
A large carton may weigh very little but take up significant cargo space, while a small box containing metal components may be extremely heavy.
Understanding actual weight, volumetric weight and chargeable weight can help you estimate international shipping costs more accurately before arranging air freight, consolidation or China-to-Australia shipping.
What Is Light or Bulky Cargo?
Light or bulky cargo generally refers to goods that occupy a relatively large amount of space compared with their actual weight.
For example, a large carton containing down jackets, pillows or lightweight plastic products may not weigh very much, but it still uses a significant amount of aircraft or vehicle capacity.
Common examples include:
- Down jackets
- Pillows and sleeping bags
- Soft toys
- Plastic products
- Lighting products
- Some furniture
- Bulky clothing
- Products with oversized packaging
In simple terms, the shipment looks large but feels relatively light.
What Is Heavy Cargo?
Heavy cargo usually has a higher weight relative to its physical size.
For example, two cartons may have similar dimensions, but one containing clothing may weigh only 10 kg while another containing metal parts may weigh 50 kg.
Common examples include:
- Metal components
- Machinery
- Hardware products
- Tiles
- Stone products
- Books
- High-density moulds
Some automotive parts
These shipments may not occupy much space but can be very heavy.
Why Does International Freight Consider Cargo Volume?
Transportation capacity is limited by both weight and available space.
For example, an aircraft has a maximum payload but also a limited amount of cargo space.
If freight were always charged according to physical weight alone, a very large but lightweight carton could occupy a significant portion of the aircraft while being charged very little.
This is why international freight commonly uses:
Volumetric Weight
also known as:
Dimensional Weight
to represent the amount of transport space a shipment occupies.
What Is Actual Weight?
Actual weight is the physical weight measured when the packed shipment is placed on a scale.
For example:
If a packed carton weighs 20 kg, its actual weight is 20 kg.
However, for many international air freight and courier services, actual weight alone is not enough to determine the final shipping charge.
Package dimensions are also required.
What Is Volumetric Weight?
Volumetric weight is a calculated weight based on the dimensions of the package rather than its physical weight.
One commonly used formula is:
Length × Width × Height ÷ 6000
with the dimensions measured in centimetres and the result expressed in kilograms.
For example:
60cm × 50cm × 40cm
60 × 50 × 40 ÷ 6000 = 20kg
The volumetric weight of the carton would therefore be 20 kg.
However, 6000 is only one commonly used volumetric factor.
Different airlines, courier services and freight channels may use factors such as 5000, 6000 or another standard.
Always check the calculation method used by the specific shipping service.
What Is Chargeable Weight?
Chargeable weight is the weight used to calculate the freight charge.
For many air freight and international courier services, the carrier compares:
Actual Weight
and
Volumetric Weight
and generally uses the higher figure as the chargeable weight.
For example:
Actual weight: 15kg
Volumetric weight: 25kg
The shipment is relatively bulky and may be charged based on approximately 25kg.
If:
Actual weight: 35kg
Volumetric weight: 20kg
the shipment is relatively heavy and may be charged using the actual weight of 35kg.
The exact rounding and charging rules depend on the shipping service.
How Can You Tell Whether Cargo Is Light or Heavy?
A simple comparison can help.
Step 1: Measure Actual Weight
Weigh the shipment after packing.
For example:
Actual weight = 18kg
Step 2: Measure Package Dimensions
Measure the longest, widest and highest points of the packed carton.
For example:
70cm × 50cm × 40cm
Step 3: Calculate Volumetric Weight
Using a volumetric factor of 6000:
70 × 50 × 40 ÷ 6000 ≈ 23.3kg
Because the volumetric weight of 23.3kg is higher than the actual weight of 18kg, the shipment is relatively bulky.
If the actual weight were 30kg while the volumetric weight remained 23.3kg, the shipment would be considered relatively heavy.
Why Is My Parcel 20kg but Charged as 30kg?
This is a common question among customers using international consolidation services.
For example, products purchased from Taobao, 1688 or other Chinese suppliers may have a total physical weight of only 20kg.
However, if the products are packed in several oversized cartons with large amounts of empty space, the calculated volumetric weight may reach 30kg or more.
If the shipping service uses the higher of actual weight and volumetric weight, the shipment may therefore be charged based on 30kg rather than 20kg.
Why Can Taobao Consolidation Create High Volumetric Weight?
When buying products from multiple Chinese sellers, each supplier normally sends a separate domestic parcel.
These parcels may contain:
- Oversized cartons
- Excess packaging
- Multiple shoe boxes
- Large amounts of filling material
- Unused space inside cartons
- Separate packaging for small products
Sending every parcel internationally in its original packaging may result in a much higher total volumetric weight.
Depending on the products, China warehouse consolidation may allow parcels to be:
- Checked
- Consolidated
- Repacked
- Reorganised
- Measured again
- Packed into more suitable cartons
For freight services that use volumetric weight, reducing unnecessary packaging can sometimes reduce the final chargeable weight.
How Should Irregular Cargo Be Measured?
International freight dimensions are normally based on the maximum external space occupied by the package.
For irregular cargo, measure the:
Longest point
Widest point
Highest point
For example, if most of a package is 40cm wide but one section extends to 55cm, the maximum width may need to be treated as 55cm.
This can be particularly important for:
- Furniture
- Fitness equipment
- Machinery
- Irregular cartons
- Oversized products
Accurate packed dimensions help avoid unexpected differences when the shipment is remeasured at a warehouse.
How Can Packaging Affect Shipping Costs?
Packaging can have a significant impact on freight costs for bulky cargo.
For example, the same batch of clothing may occupy:
0.50 CBM before repacking
and
0.35 CBM after better consolidation and compression.
The physical weight has not changed, but the amount of shipping space required has been reduced.
Where appropriate, reducing oversized cartons, duplicate packaging, unnecessary filling materials and empty space can improve shipping efficiency.
However, fragile products such as glass, ceramics, marble and furniture should not be over-compressed simply to reduce volume.
Safe transportation remains important.
Do Air Freight and Sea Freight Use the Same Volumetric Weight Rules?
Not necessarily.
International air freight and courier services commonly compare actual weight with volumetric weight when determining chargeable weight.
Sea freight is different.
LCL sea freight may consider factors such as:
- CBM
- Cargo weight
- Product type
- Destination
- Local handling
- Delivery requirements
Some services may also apply minimum volumes, weight limits or W/M charging rules.
The air freight formula of length × width × height ÷ 6000 should therefore not be assumed to apply to every sea freight shipment.
For large-volume and relatively lightweight cargo such as furniture and household goods, sea freight may often be a more suitable option than air freight.
Is Light Cargo Always More Expensive Than Heavy Cargo?
No.
Light and heavy cargo simply describe the relationship between cargo volume and weight.
They do not determine the final freight cost by themselves.
Shipping costs may also depend on:
- Shipping method
- Total cargo volume
- Actual weight
- Destination
- Product category
- Packaging
- Oversized dimensions
- Local delivery requirements
- Current freight rates
A bulky shipment transported by sea may be economical, while a small but extremely heavy machine may require additional handling and generate a higher shipping cost.
The most suitable shipping method depends on the complete shipment information.
How Can You Reduce Shipping Costs for Bulky Cargo?
If your shipment has a high volumetric weight, start by checking the packaging.
Possible options may include:
- Removing unnecessary packaging
- Discarding oversized domestic courier cartons
- Consolidating multiple parcels
- Compressing suitable textiles
- Using more appropriately sized cartons
- Reducing unused internal space
- Reorganising products inside the package
For large shipments that are not urgent, it may also be worth comparing air freight with sea freight.
Sometimes choosing a transportation method designed for bulky cargo can be more effective than trying to reduce volumetric weight alone.
What Information Is Needed for a China-to-Australia Freight Quote?
To estimate whether your shipment is bulky or heavy and determine a suitable shipping method, provide:
- Cargo description
- Quantity
- Actual weight
- Packed dimensions
- Number of cartons
- Australian suburb and postcode
- Door-to-door delivery requirements
- Any fragile or special cargo information
For multiple Taobao or supplier orders, the goods can also be consolidated in a China warehouse first and measured together before comparing air freight and sea freight options.
Ship from China to Australia with Chinz Logistics
Chinz Logistics provides China-to-Australia international freight services, including:
- China to Australia sea freight
- China to Australia air freight
- Taobao and e-commerce consolidation
- LCL shipping
- FCL shipping
- Furniture and oversized cargo
- China warehousing
- Cargo consolidation
- Packing and protective packaging
- Local delivery in Australia
For light cargo, heavy cargo, furniture, oversized goods and commercial shipments, shipping options can be selected based on actual weight, cargo volume, delivery timeframe and Australian destination.
If you are preparing a shipment from China to Australia, provide:
Cargo description + quantity + actual weight + packed dimensions + Australian suburb + postcode
to help determine the chargeable weight and suitable freight option.
