What Is CBM in Shipping?
CBM, short for Cubic Meter, is a standard unit of measurement used to calculate the volume of cargo in international logistics. It is essential for determining shipping costs, especially in air freight, sea freight, and international express delivery.
Why Is CBM Important?
Every mode of transport—whether by plane, ship, or truck—has limited capacity in both weight and volume. Understanding CBM helps ensure:
Efficient use of space
Accurate freight billing
Safe cargo handling
FCL vs LCL: When CBM Really Matters
When shipping via containers, there are two main modes:
FCL (Full Container Load):
You rent the entire container. CBM is not a major factor in billing.LCL (Less than Container Load):
You share the container with others. The freight charge is directly based on your cargo’s CBM, making it a key cost driver.
How to Calculate CBM?
The formula is simple:
📌
Length (m) × Width (m) × Height (m) = CBM
（Insert your visual formula image here）
Make sure the dimensions are measured in meters to get the correct CBM.
CBM vs Gross Weight: Which One Affects Freight?
Shipping providers will often compare two types of weights:
Actual Gross Weight (measured in KG)
Volumetric Weight (calculated from CBM)
Whichever is greater will be used to determine your final freight cost.
Common Billing Ratios for LCL Sea Freight
Depending on the carrier, freight forwarder, or destination, different dimensional weight ratios may apply:
| Rule | Example Calculation (Volume: 0.8 CBM, Weight: 1200 KG) |
|---|---|
| 1 CBM = 1000 KG | 1200 ÷ 1000 × Rate |
| 1 CBM = 750 KG | 1200 ÷ 750 × Rate |
| 1 CBM = 500 KG | 1200 ÷ 500 × Rate |
| 1 CBM = 363 KG | 1200 ÷ 363 × Rate |
These standards vary by region and carrier, so it’s best to confirm with your logistics provider.
Final Tips
Always provide accurate dimensions of your cargo.
CBM is especially crucial for LCL, air freight, and Amazon FBA shipments.
Use CBM calculators or consult freight forwarders to avoid unexpected charges.
✉️ Still unsure how CBM affects your shipment? Contact our logistics experts for a free consultation!
