Logistics Tools
Volumetric Weight Calculator
Volumetric Weight, also known as dimensional weight, is a critical metric used by air freight and international express carriers to determine shipping costs. When a shipment is large in size but relatively light in actual weight (commonly referred to as “Light Weight Cargo”), carriers will bill based on volumetric weight; otherwise, actual weight is used. By entering the outer dimensions, quantity, and selecting the carrier’s specific volumetric factor, you can instantly calculate the volumetric weight and reference chargeable weight. Please note that final billing remains subject to the carrier’s official rules and formal quotation.
CBM Calculator ▶
Input the length, width, height, and quantity of your outer packaging to quickly calculate the total volume in Cubic Meters (CBM) and Cubic Feet (Cuft).
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.
Calculation Standards & Benchmarks
Chargeable Weight and DIM Factor Guide
What is Light Weight Cargo?
Light Weight Cargo refers to shipments that occupy significant space relative to their actual weight, such as quilts, foam, plastic products, or large empty boxes. Since these items consume more cargo hold capacity, carriers cannot bill based solely on actual weight and instead use “Volumetric Weight” as the billing benchmark. Conversely, items where the actual weight exceeds the volumetric weight—such as hardware or machinery parts—are classified as “Heavy Cargo” and are billed by actual weight. The key to determination is the “greater of the two,” which becomes the Chargeable Weight.
The Constant Difference: Air Freight (÷6,000) vs. International Express (÷5,000)
The formula for volumetric weight is: (Length × Width × Height in cm) ÷ Volumetric Factor. General air freight typically uses a factor of 6,000 (where 1 CBM ≈ 167 kg), while international express services often use 5,000 (where 1 CBM ≈ 200 kg). This discrepancy arises from different carrier calculations regarding cargo space efficiency. Some express couriers or specific routes may apply different factors. We recommend confirming the applicable rules with your carrier before shipping; this tool allows you to toggle between the two most common factors: ÷6,000 and ÷5,000.
Solving Your Calculation Queries
Frequently Asked Questions
What is Chargeable Weight?
Chargeable Weight is the actual weight used by carriers to calculate freight costs, determined by taking the greater of the “Actual Weight” or the “Volumetric Weight.” For example, if a box has an actual weight of 12 kg but a volumetric weight of 20 kg, the chargeable weight is 20 kg. For multiple boxes of varying sizes, each should be compared individually before totaling; if dimensions are identical, you may calculate the total volume before conversion. Additionally, most carriers round up the chargeable weight to the next whole unit (e.g., 3.3 kg is billed as 4 kg; 28.8 kg as 29 kg). Actual rules are subject to the carrier’s official policy.
How do I calculate irregular packaging?
For irregular or stacked cargo, you should use the maximum length, width, and height. If the box is bulging or has protruding parts, measurements should be taken from the furthest points and rounded up. For palletized cargo, the calculation is typically based on the overall dimensions and total weight of the pallet including the goods. If a single shipment contains multiple box sizes, we suggest inputting them in groups and summing the results to more accurately reflect the carrier’s actual billing method.
