International air freight may appear straightforward:
Measure the cargo, confirm the weight, obtain a quotation and book the flight.
In practice, many air freight delays and unexpected costs begin with these basic details.
Common problems include:
- Cargo that is too tall for the planned aircraft
- Incorrect dimensions
- Weight changes
- High volumetric weight
A shipment being moved from passenger aircraft to freighter aircraft
Cheaper routings involving additional transshipments
Accurate cargo information is therefore one of the most important parts of air freight planning.
Why Do Accurate Dimensions and Weight Matter?
An air freight quotation normally requires:
- Number of Pieces
- Gross Weight
- Dimensions
These details affect:
- Aircraft suitability
- Available cargo space
- Flight options
- Chargeable weight
- Final freight cost
A shipment can be relatively light but still unsuitable for an aircraft because of its dimensions.
This is particularly important for tall crates, machinery and palletised cargo.
How Does Aircraft Size Limit Air Cargo?
A large amount of international air cargo does not move on dedicated cargo aircraft.
Instead, it travels in the:
Belly Hold
of passenger aircraft.
This is the cargo section underneath the passenger cabin.
According to the operating example in the source material, many passenger aircraft belly holds may have approximately 165–167cm of height, meaning cargo may need to remain around 160cm or below for practical loading.
This is why packed cargo height must be confirmed accurately before booking.
What Happens If Cargo Is Too Tall?
A crate that is approximately:
180cm high
may not physically fit into the belly hold of a standard passenger aircraft.
Even where the cargo weight is acceptable, aircraft dimensions can prevent loading.
If the shipment was originally booked at 150cm high but reaches the terminal at 180cm, the original service may no longer be suitable.
The shipment may require:
- Rebooking
- A different flight
- A different aircraft
- Freighter Aircraft
This can affect both cost and transit time.
When Is a Freighter Aircraft Required?
Oversized cargo that cannot fit inside a passenger aircraft belly hold may need to move on a:
Freighter Aircraft.
Freighters dedicate significantly more aircraft space to cargo and can accommodate larger freight on the main deck.
They may be suitable for:
- Tall crates
- Oversized machinery
- Industrial equipment
- Cargo that cannot physically fit in passenger belly compartments
For some urgent oversized shipments, a freighter may be the practical air transport solution.
Why Is Freighter Air Freight More Expensive?
Freighter aircraft can provide greater cargo flexibility, but they may also involve:
- Fewer service options
- More limited schedules
- Special handling
- More specialised capacity
- Higher freight rates
Passenger aircraft generate revenue from both passengers and belly cargo.
Dedicated freighter operations depend much more heavily on cargo revenue.
For this reason, moving a shipment from passenger belly capacity to a freighter service can significantly change the quotation.
Why Can a Light Shipment Still Be Expensive?
Air freight is not always charged simply as:
- Actual Weight × Rate per KG.
- Airlines may also apply:
- Minimum Charges
- and route-based yield requirements.
Even a light shipment still occupies handling capacity and aircraft space.
On high-demand routes, airlines may require a minimum level of freight revenue before accepting the cargo.
Actual pricing depends on factors such as:
- Route
- Capacity
- Demand
- Cargo dimensions
- Airline
- Service type
For very small shipments, traditional air freight may therefore not always provide the best value.
When Can Courier Be Better for Small Shipments?
Low-weight shipments can also be compared with:
International Courier
services.
Courier networks are designed specifically for smaller parcels and may offer more efficient pricing for cargo such as:
- Samples
- Documents
- Small components
- E-commerce parcels
- Urgent spare parts
As shipment size and weight increase, conventional air freight may become more appropriate.
The two services use different pricing and handling structures, so the best option depends on the individual shipment.
What Is Volumetric Weight?
An important air freight concept is:
Volumetric Weight.
Aircraft space is limited.
Airlines therefore need to consider both:
How much cargo weighs
and
How much space it occupies.
A dense metal shipment may weigh a lot while using very little space.
Light products such as foam or large displays may occupy significant aircraft capacity while weighing very little.
Volumetric weight helps account for this difference.
How Is Air Freight Volumetric Weight Calculated?
A commonly used air freight conversion is:
1 CBM ≈ 167 KG
A common formula is:
Length (cm) × Width (cm) × Height (cm) ÷ 6000
For example:
100cm × 100cm × 100cm
equals:
1 CBM
and approximately:
167kg volumetric weight.
If the shipment only weighs 80kg physically, its volumetric weight may still be approximately 167kg.
What Is Chargeable Weight?
Chargeable Weight is the weight used to calculate the air freight charge.
Airlines commonly compare:
Actual Weight
and
Volumetric Weight.
The higher figure generally becomes the chargeable weight.
For example:
Actual Weight: 100kg
Volumetric Weight: 167kg
Chargeable Weight may therefore be:
167kg.
If:
Actual Weight: 300kg
Volumetric Weight: 167kg
then the higher actual weight may be used.
This is why an accurate air freight quotation usually requires both weight and dimensions.
Why Does Packaging Size Matter?
In air freight:
Larger Packaging = Higher Volumetric Weight.
A product may remain unchanged, but oversized crating can significantly increase its chargeable weight.
Unnecessary empty space around the cargo can therefore increase freight costs.
Where safe to do so, efficient packaging may help reduce:
Crate dimensions
Pallet height
Unused internal space
However, packaging quality should not be sacrificed simply to reduce freight cost, particularly for fragile or precision equipment.
What Information Is Needed for an Air Freight Quote?
Useful information includes:
- Cargo description
- Number of pieces
- Dimensions of each piece
- Weight of each piece
- Total gross weight
- Origin city
- Destination city
- Battery information
- Dangerous goods status
- Expected shipping date
Three of the most important details are:
- Correct Dimensions
- Correct Weight
- Correct Number of Pieces.
Changes to any of these details can affect aircraft capacity and pricing.
Why Is the Cheapest Air Freight Route Not Always the Best?
Air freight quotations can vary significantly in both price and service.
A cheaper service may involve:
- Additional transshipments
- Longer transit times
- More airport handling
- More warehouse movements
- A more direct service may cost more but reduce handling and transit time.
For:
- High-value cargo
- Precision equipment
- Fragile goods
- Urgent spare parts
- the service behind the freight rate can be just as important as the rate itself.
When comparing quotations, consider:
- Routing
- Transit Time
- Number of Transshipments
- Airline
- Flight Schedule
- as well as price.
How Can Cheap Routing Increase Delay Risk?
Consider two air freight options.
Option A:
Lower price but two transshipments.
Option B:
Higher price but a more direct routing.
At a transshipment airport, cargo may be affected by:
Inbound flight delays
Limited onward capacity
Terminal congestion
Documentation issues
Missed connections
For routine inventory this may be manageable.
For cargo required for:
- Production repairs
- Project installation
- Trade shows
- Urgent replenishment
- Machinery downtime
transit reliability may be more important than a small freight saving.
How Can Routing Affect Cargo Risk?
Every additional transfer can involve another:
- Aircraft unloading
- Warehouse movement
- Terminal transfer
- Pallet build-up
- Aircraft loading
Additional handling does not automatically mean damage will occur, but it increases the number of physical movements the cargo experiences.
For high-value or sensitive shipments, businesses may therefore consider:
- More direct routing
- Fewer transshipments
- Reliable airline services
- Cargo insurance appropriate to the shipment
Why Do Air Freight Rates Change?
Air freight capacity and pricing can change frequently.
Factors may include:
- Flight frequency
- Passenger aircraft capacity
- Freighter capacity
- Seasonal demand
- Route demand
- Available space
- Airline surcharges
The same shipment quoted today may therefore have a different rate when it is ready to ship several weeks later.
For urgent or important cargo, confirming space closer to the actual shipping date is important.
Common Air Freight Mistakes
Common issues include:
- Providing weight without dimensions
- Using product dimensions instead of packed dimensions
- Packing crates too tall for passenger aircraft
- Large differences between booked and actual weight
- Failing to declare batteries or dangerous goods
- Ignoring volumetric weight
- Comparing only the rate per kilogram
- Not checking the routing
- Not confirming estimated transit time
- Discovering too late that a freighter aircraft is required
Many of these issues can be reduced through accurate pre-shipment planning.
How Should an Air Freight Service Be Selected?
There is no single air freight solution for every shipment.
Important considerations include:
- Cargo dimensions
- Actual weight
- Volumetric weight
- Cargo value
- Required delivery time
- Dangerous goods status
- Passenger or freighter aircraft
- Direct or transshipment routing
- Final delivery deadline
- Small cargo may be compared with courier services.
- Oversized equipment may require freighter aircraft.
Standard commercial cargo may be suitable for passenger aircraft belly capacity.
The goal is not simply to find the lowest:
Price per KG.
It is to select a service that matches the cargo and required delivery schedule.
Chinz Logistics International Air Freight
Chinz Logistics provides international air freight services between China, Australia and other global markets, including:
- China to Australia air freight
- International air cargo
- Commercial air freight
- Urgent spare parts
- Precision equipment transport
- Machinery air freight
- Dangerous goods freight solutions
- International courier
- China collection and warehousing
- Export customs support
- Destination customs clearance and local delivery
Air freight options can be assessed according to cargo dimensions, actual weight, volumetric weight, urgency and routing requirements.
If you are preparing an air freight shipment, provide:
Cargo description + number of pieces + dimensions of each package + weight of each package + total gross weight + battery/DG information + origin city + destination city + expected shipping date
to help determine the chargeable weight, suitable aircraft and freight option.
