Volumetric Weight Formula: How to Calculate It for Shipping?

Understanding the volumetric weight formula is essential for businesses engaged in shipping goods, especially in the B2B sector. This calculation ensures that shipping costs accurately reflect the space a package occupies, rather than just its actual weight. By mastering this concept, companies can optimise shipping expenses and avoid unexpected charges.
In this article, we delve into the formula to calculate volumetric weight for air freight, how to determine volumetric weight in kg, and practical strategies to minimise shipping costs. We’ll also walk through real-world calculations to help businesses make informed decisions.
- What Is Volumetric Weight?
- Why Is Volumetric Weight Important in Shipping?
- The Standard Volumetric Weight Formula
- Calculating Volumetric Weight in Kilograms
- Volumetric Weight in Air Freight
- Calculating Shipping Costs Using Volumetric Weight
- Factors Influencing the Dimensional Factor
- Tips for Businesses to Manage Shipping Costs
- WareIQ: Redefining E-Commerce Fulfilment
- Summing Up
- FAQs about the Volumetric Weight Formula
What Is Volumetric Weight?
Volumetric weight, also known as dimensional weight, is a pricing technique used by freight carriers to account for the space a package occupies in relation to its actual weight. This method ensures that large, lightweight packages are charged appropriately, as they take up significant space in a carrier’s vehicle or aircraft.
Why Is Volumetric Weight Important in Shipping?
Shipping carriers have finite space, and transporting bulky items that weigh little can be less efficient than shipping compact, heavier items. By using volumetric weight calculations, carriers can:
- Optimise Space Utilisation: Ensure that space is used efficiently, leading to better resource management.
- Fair Pricing: Charge customers based on the space their package occupies, preventing revenue loss on large, lightweight shipments.
- Standardisation: Create a uniform method to assess shipping costs, making it easier for businesses to predict expenses.
The Standard Volumetric Weight Formula
The volumetric weight formula varies slightly depending on the mode of transport and the carrier. However, the general calculation is:
Volumetric Weight (kg) = Length (cm) * Width (cm) * Height (cm) / Dimensional Factor
The dimensional factor is a number set by carriers to convert the volume of a package into its volumetric weight. Common dimensional factors include:
- Air Freight: 6000
- Road and Sea Freight: 5000
Calculating Volumetric Weight in Kilograms
To calculate the volumetric weight in kg, follow these steps:
- Measure the Package Dimensions: Use a tape measure to find the length, width, and height of the package in centimetres. Measure at the longest points, including any protrusions.
- Apply the Volumetric Weight Formula: Multiply the length, width, and height to get the cubic centimetre volume. Then, divide this number by the dimensional factor.
For example, for a package measuring 50 cm × 40 cm × 30 cm:
Volumetric Weight = 50*40*30/5000=60000/5000=12 kg - Compare with Actual Weight: Weigh the package on a scale. If the actual weight exceeds the volumetric weight, carriers will charge based on the actual weight. Otherwise, charges are based on the volumetric weight.
Volumetric Weight in Air Freight
Airlines are particularly stringent about volumetric weight due to limited cargo space and weight restrictions. The formula to calculate volumetric weight for air freight is:
Air Freight Volumetric Weight (kg)=Length (cm) * Width (cm) * Height (cm) / 6000
Using the previous example:
Air Freight Volumetric Weight = 50*40*30/6000 = 60000/6000 = 10 kg
Calculating Shipping Costs Using Volumetric Weight
Carriers determine shipping charges based on the higher value between the actual weight and the volumetric weight.
Example Calculation for Shipping Cost
- Package Dimensions: 70 cm × 50 cm × 40 cm
- Actual Weight: 25 kg
- Dimensional Factor (for air freight): 6000
- Shipping Rate per kg: ₹400
Step 1: Calculate Volumetric Weight
Volumetric Weight = 70*50*40/6000 = 140000/6000 = 23.3 kg
Step 2: Compare Actual and Volumetric Weight
- Actual Weight: 25 kg
- Volumetric Weight: 23.3 kg
- Since the actual weight is higher, the shipping cost is calculated based on 25 kg.
Step 3: Calculate Final Shipping Cost
Shipping Cost = 25*400 = ₹10,000
If the volumetric weight had been higher, the carrier would charge based on that instead.
Factors Influencing the Dimensional Factor
The dimensional factor can vary based on:
- Carrier Policies: Different carriers may set their own dimensional factors based on their operational costs and space considerations.
- Mode of Transport: Air freight typically uses a higher dimensional factor (e.g., 6000) compared to road or sea freight (e.g., 5000) due to stricter space and weight constraints.
- Geographical Regions: Some regions may have standardised dimensional factors influenced by local regulations or industry standards.
Tips for Businesses to Manage Shipping Costs
- Package Optimisation: Design packaging that minimises empty space without compromising product safety. This reduces the volumetric weight and, consequently, shipping costs.
- Negotiate with Carriers: Regularly shipping large volumes may provide leverage to negotiate better dimensional factors or rates with carriers.
- Use Professional Fulfilment Services: Partnering with fulfilment companies can offer optimised packaging solutions and better shipping rates.
WareIQ: Redefining E-Commerce Fulfilment
Regarding multi-channel fulfilment solutions, WareIQ stands out as a trusted partner for businesses of all sizes. Y-Combinator-backed eCommerce full-stack platform offering multi-channel fulfilment across D2C, Marketplaces, Quick Commerce, and B2B (General Trade & Modern Trade).
Why Choose WareIQ?
- Pan-India Network: We operate a vast network of Seller Flex and FAssured compliant centres in over 12 cities, ensuring efficient last-mile delivery across more than 27,000 pin codes.
- Multi-Channel Fulfilment Platform: With plug-and-play integrations for major marketplaces like Amazon, Flipkart, and Myntra and D2C platforms such as Shopify and Magento, our platform supports seamless fulfilment across distributors and flagship stores. Advanced analytics capabilities help assess operational performance effectively.
- AI-Led Inventory Management: Our Inventory LogIQ solution minimises stockouts and automates replenishment, ensuring optimal inventory levels.
- Tech-Enabled Returns Management: We provide a sophisticated returns quality control solution that captures and stores media evidence of returned products, helping eliminate marketplace claim rejections.
- Comprehensive Seller Support: Benefit from dedicated account management, assistance with APOB/PPOB registrations, GST registration, and verification processes for NDR & COD.
For businesses looking to scale their operations and enhance customer satisfaction, WareIQ offers a reliable, tech-driven solution. Learn more at WareIQ’s website.
Summing Up
Understanding and accurately calculating the volumetric weight formula is essential for businesses looking to optimise shipping costs. Since carriers charge based on the greater value between actual weight and volumetric weight, companies must adopt smart packaging strategies to avoid inflated shipping fees.
By following best practices, such as optimising packaging, negotiating rates, and leveraging fulfilment services like WareIQ, businesses can significantly reduce logistics expenses and improve efficiency. Adopting a cost-effective shipping strategy ensures profitability while maintaining fast and reliable deliveries.
FAQs about the Volumetric Weight Formula
What is the volumetric weight formula in kg?
The volumetric weight formula in kilograms is calculated by multiplying the package’s length, width, and height (in centimetres) and dividing the result by a dimensional factor, typically 5000 or 6000, depending on the carrier.
How do I calculate volumetric weight for air freight?
To calculate volumetric weight for air freight, measure the package dimensions in centimetres, multiply the length by width by height, and divide by 6000. This standard divisor is commonly used in air freight calculations.
Why is the volumetric weight formula important in shipping?
The volumetric weight formula ensures that shipping charges reflect the space a package occupies rather than just its actual weight, preventing undercharging for large, lightweight packages.
Do all carriers use the same volumetric weight formula?
While the basic volumetric weight formula is consistent, carriers may use different dimensional factors (e.g., 5000 or 6000) based on their policies and the mode of transport. It’s essential to verify the specific divisor with your carrier.
Can optimizing packaging affect the volumetric weight?
Yes, using efficient packaging that reduces unnecessary space can lower the volumetric weight, potentially decreasing shipping costs.