Accurately determine the chargeable weight of your shipments using standard carrier formulas. Compare actual weight vs. dimensional weight instantly to avoid unexpected shipping fees.
Volumetric Weight Calculator
Enter shipment dimensions and weight to calculate billable mass.
Metric (cm / kg)
Imperial (in / lb)
Select your preferred measurement system.
Please enter a valid length greater than 0.
Please enter a valid width greater than 0.
Please enter a valid height greater than 0.
The physical weight of the package including packing materials.Please enter a valid weight.
5000 (Standard Express/Air – DHL, FedEx Intl)
6000 (Economy/Domestic – TNT, Some Ground)
4000 (Specialized Freight)
139 (Imperial Standard – UPS/FedEx US)
166 (Imperial Ground/Retail)
The factor used by the carrier to convert volume to weight.
Chargeable Weight (Billable)12.00 kgBased on Volumetric Weight > Actual Weight
Volumetric Weight:12.00 kg
Actual Weight:5.00 kg
Total Volume:60,000 cm³
Fig 1. Comparison of Actual Weight vs. Calculated Volumetric Weight.
Courier volumetric weight calculation (also known as dimensional weight or DIM weight) is a pricing technique used by commercial freight transport and postal companies. It ensures that the cost of shipping a package accounts for the amount of space it occupies on an aircraft, truck, or container, not just its physical heaviness.
Shipping carriers operate with limited space. A box filled with feathers might be light physically, but if it takes up half the cargo hold, the carrier loses money if they only charge by weight. Therefore, the courier volumetric weight calculation determines a theoretical weight based on the package dimensions. The carrier will always charge the higher of the two: the actual weight or the volumetric weight.
This calculation is crucial for e-commerce businesses, logistics managers, and individuals shipping large but light items. Understanding it helps prevent "bill shock" where shipping costs are significantly higher than anticipated due to box size.
Courier Volumetric Weight Calculation Formula
The math behind the calculation is relatively standardized but relies on a specific "divisor" or "DIM factor" set by the carrier. The standard formula for metric calculations (cm/kg) typically used by international couriers like DHL, FedEx, and UPS is:
Financial Impact: The volumetric weight (1.6kg) is lower than the actual weight (15kg). The carrier will ignore the volumetric calculation and bill you for the 15kg actual weight.
How to Use This Courier Volumetric Weight Calculator
Select Unit: Choose between Metric (cm/kg) or Imperial (in/lb) depending on your location and carrier.
Measure Dimensions: Input the Length, Width, and Height. Tip: Always measure the longest points, including bulges or handles.
Enter Weight: Input the actual gross weight of the package.
Choose Divisor: Select the divisor used by your specific carrier (e.g., 5000 is standard for international air freight).
Analyze Results: The tool will instantly show you the "Chargeable Weight." Use this number to request shipping quotes.
Key Factors That Affect Courier Volumetric Weight Results
Several financial and logistical factors influence the final outcome of your courier volumetric weight calculation:
Carrier Divisors: Express services often use 5000, while ground services might use 6000 or even higher. A higher divisor results in a lower billable weight, which is cheaper for the shipper.
Packaging Efficiency: Empty space in a box costs money. Using a box that is 10cm too large on every side can double your shipping cost without adding any product value.
Bulging Boxes: Carriers scan dimensions using lasers. If a box bulges due to overpacking, the machine records the maximum width, increasing the calculated volume.
Rounding Rules: Most couriers round dimensions up to the nearest 0.5cm or whole inch before calculating. This small "inflation" adds up across thousands of shipments.
Palletization: If you ship on pallets, the empty space between boxes and the pallet height itself is often included in the volumetric calculation.
Minimum Densities: Some freight routes have minimum density requirements. If your cargo is extremely light, you might face surcharges beyond standard volumetric rates.
Frequently Asked Questions (FAQ)
What is the standard divisor for international air freight?
The industry standard for international air couriers (like DHL, FedEx Express, UPS Worldwide) is usually 5000 (cm³/kg). However, you should always check your specific contract as high-volume shippers may negotiate a divisor of 6000.
Does courier volumetric weight calculation apply to sea freight?
Yes, but the formula is different. Sea freight (LCL) usually relies on a "W/M" (Weight or Measure) ratio, typically 1 CBM (Cubic Meter) = 1000 kg. This is much more forgiving than air freight.
How can I reduce my volumetric weight?
Use the smallest possible box for your item. Consider vacuum sealing soft goods (like clothing or bedding) to reduce volume. Break down complex items to pack them flatter.
Why is my divisor 139 or 166?
These are imperial divisors used primarily in the USA. 166 is common for domestic ground shipping (inches/lbs), while 139 is often used for international shipments originating from the US.
What happens if I enter the wrong dimensions?
Couriers use automated dimension scanners at sorting hubs. If your declared courier volumetric weight calculation is lower than their scan, they will issue an adjustment invoice, often accompanied by an administrative fee.
Do tubes or irregular shapes count?
Yes. For tubes, the diameter is usually treated as both width and height, effectively calculating it as a square prism. Irregular shapes are measured by the smallest rectangular box they would fit inside.
Is actual weight ever irrelevant?
Only if the volumetric weight is higher. The carrier always charges the maximum of the two. Actual weight is never truly irrelevant because it affects safety and handling limits.
Does the weight of the box itself count?
Yes, the actual weight used for comparison is the "Gross Weight," which includes the product, packaging, tape, and labels.