You should understand what CBM (short for Cubic Meter ) is when you are transporting your shipments through any mode of transportation, whether by sea, air, or road, since it can help you save significant money, effort, and time.
Why? CBM plays a major role in determining freight costs. This article will explore the Cubic Meter in detail, how to calculate it, and its importance in the logistics industry.
What Is the Meaning of CBM in Logistics?
CBM, or Cubic Meter, is a unit of measurement that is used to highlight the volume of the cargo. It represents the entire space occupied by your cargo.
If your shipment has a higher CBM, it means that your shipment will require more space, so the transportation cost will be higher as well. This is a universal metric that is used to standardize the shipping volume calculations in different modes of transportation like sea, air, and road freight.
Moreover, CBM greatly affects your freight charges. It has a significant impact on the major and additional charges that are imposed on your shipments. For example, if you deal with LCL shipments, you will find that some charges listed on your freight forwarder’s quote, such as terminal handling fees, consolidation fees, and warehouse storage fees, are all based on the Cubic Meter.
Related Reading: What’s GRI on freight quotes?
Importance of CBM in Freight
Cost Estimation:
CBM helps calculate freight costs by considering shipment volume and weight, making it easier to budget for cargo transportation.
Efficient Space Utilization:
Knowing your shipment’s CBM enables optimal container use, reducing empty space and maximizing efficiency.
Mode of Transport Selection:
Cubic Meter helps choose the right transportation method (truck, trailer, flat-rack, sea, or air freight) and assesses container size requirements.
Customs and Documentation:
Accurate CBM ensures smooth customs declarations and minimizes delays during clearance.
CBM Calculation for Your Cargo
Calculating CBM is considered a relatively simple step. The formula used to calculate the actual cubic meters of your shipment is as follows:
CBM = Length × Width × Height × Number of Items in your cargo.
For example, you have 5 boxes, and each of these boxes measures around 2 meters in length, 1 meter in width, and 1 meter in height. If you want to calculate the CBM of one box, you will go about the formula mentioned above:
CBM for 1 Box = 2×1×1 = 2 m³
So, the total CBM of your five boxes will be 10 cubic meters.
If your items are irregularly shaped, you would have to use modified formulas to estimate their Cubic Meter or measure their largest dimension to estimate the total volume of your cargo.
The key metrics for CBM calculation are:
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The measurements used for each item should be in the same unit, which is meters in this case.
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If it’s necessary, then you can also convert the units. For example, to convert cubic feet (ft³) to CBM (m³), you should divide by a factor of 35.3147. On the contrary, in cubic meter conversion to cubic feet, you need to multiply by 35.3147.
CBM Capacity of Containers
How many cubic meters (CBM) are in a 20-foot or 40-foot container? Learning about container capacity can help you choose the right one for your full container cargo. Here, we list the actual capacity of different container sizes.
|
Container Size |
20’ GP |
20’ HC |
40’ GP |
40’ HC |
45’ HC |
|
Capacity |
28 CBM |
37 CBM |
58 CBM |
68 CBM |
78 CBM |
(GP: General Purpose, HC: High Cube)
More About Container Sizes and Dimensions
How to Convert Between CBM and Weight?
For the shipping world, shipping companies use weight-to-volume ratios to estimate CBM. They compare the actual Cubic Meter and the estimated one, choosing the higher one to calculate your freight cost. Internationally:
For Air Freight:
1 CBM = 167 kg
For example, if your shipment weighs 200 kg, the estimated CBM is 200/167 = 1.20 CBM
For Sea Freight:
1 CBM = 1000 kg
For example, if your shipment weighs 200 kg, the estimated CBM is 200/1000 = 0.2 CBM
Note: The ratios are set by shipping carriers and can vary a lot. Talk to your freight forwarder to calculate your freight cost more accurately.
Conclusion
CBM, or the Cubic Meter, provides a standardized method for calculating the volume of the shipment. No matter what mode of transportation you are shipping goods through, it is best that you know how to calculate Cubic meters correctly.
Understanding how CBM works allows businesses and individuals to estimate shipping costs easily and optimize transport to save time and money.
FAQs
How do you calculate CBM for irregularly shaped items?
When calculating the Cubic Meter for items that are irregularly shaped, you should first measure the largest dimensions of the cargo and then apply the standard CBM formula to them. In the case your items are cylindrical, then it’s better to use the formula below: π × r² × h. Here, “r” is the radius, and “h” is the height of the item.
Why is the volumetric weight used and not the actual weight used to determine freight cost?
When shipping lightweight but bulky items, such as cotton, volumetric weight is used to determine the freight cost. This is because such items occupy more space relative to their actual weight. Using volumetric weight ensures fair pricing by accounting for the space they consume.
