Logistics Tools
CBM Calculator
CBM (Cubic Meter) is the fundamental unit for measuring cargo volume in international logistics and serves as the core basis for sea freight quotations and loading space assessments. By entering the length, width, height, and quantity of your outer packaging, you can instantly determine the total volume of your shipment in both CBM and Cubic Feet (Cuft). This tool supports both centimeters and inches, helping you quickly estimate volume and verify carrier quotation standards before shipping.
Volumetric Weight Calculator ▶
Determine the chargeable weight for your air freight shipment. Input dimensions to convert to volumetric weight based on the ÷6,000 or ÷5,000 DIM factor.
Unit Converter ▶
Quickly convert between common units of length, weight, and volume to easily verify weights and dimensions provided by carriers.
Exchange Rate Converter ▶
Instantly estimate shipping and trade costs with our converter, updated hourly with the latest spot buying rates for all major currencies.
Formula, Unit Conversion & Revenue Ton Guide
CBM Calculation and Sea Freight Billing Standards
CBM Calculation Formula and Conversion
This tool supports both centimeters and inches. The system automatically converts all inputs into meters for calculation, eliminating the need for manual conversion. We recommend using a consistent unit for the same shipment and rounding dimensions to two decimal places to maintain consistency. For example, a box measuring 60 × 40 × 50 cm equals 0.12 CBM (0.6 × 0.4 × 0.5); for a shipment of 10 boxes, the total volume is 1.2 CBM. Since 1 CBM is approximately 35.315 Cubic Feet (Cuft), the tool displays both units for easy comparison against different carrier benchmarks.
The Role of CBM in Logistics Billing
CBM is primarily used as the billing basis for sea freight, particularly for Less than Container Load (LCL) shipments. Carriers typically charge based on “Revenue Tons” (taking the greater of the volume weight or actual weight); thus, volume is often the starting point for sea freight quotes. Note that air freight and international express services do not use CBM for billing; instead, they use “Chargeable Weight” (the greater of actual weight vs. volumetric weight). To estimate air freight costs, please use our Volumetric Weight Calculator. The CBM calculated on this page serves as a reference for sea freight costs and container space evaluation.
Solving Your Calculation Queries
Frequently Asked Questions
What is the difference between CBM and Cuft? Which one should I use?
CBM stands for Cubic Meter, while Cuft (often referred to as “Cai” in Taiwan) stands for Cubic Feet. 1 CBM is approximately 35.315 Cuft, and 1 Cuft is approximately 0.028317 CBM. In Taiwan’s shipping and customs practices, “Cuft” is frequently used for communication, whereas international quotations and Bills of Lading (B/L) typically use CBM. We recommend being familiar with both. This tool displays both results simultaneously to facilitate direct comparison with your carrier or supplier’s preferred unit.
How do I calculate a shipment with multiple box sizes?
We recommend grouping your shipment by box type and calculating the CBM for each group before summing them up. For instance, if you have 20 boxes of “Type A” and 5 boxes of “Type B,” calculate the CBM for each group separately and then add them together for the total volume. Grouping is essential if dimensions vary significantly, as using average dimensions can lead to substantial errors. You can repeatedly input different dimensions and quantities into this tool to calculate and aggregate the total volume for a more accurate loading estimate.
