Volumetric weight calculator
Volumetric weight is dimensional weight in metric: length × width × height in centimeters, divided by a divisor, in kilograms. Express carriers divide by 5,000; air cargo divides by 6,000. Enter the size in centimeters and the actual weight in kilograms, pick the divisor your service uses, and compare. The imperial version is the dimensional weight calculator.
Your shipment
Measure the outside of the packed box, at the widest point. Results update as you type.
Dispute evidence checklist
If the carrier's bill differs from this estimate, gather this evidence before you dispute:
- Photo of the packed box or pallet with a tape measure across each side
- Photo of the package on a scale showing the weight
- The label or bill of lading copy with the dimensions and weight you entered
- The carrier's adjustment notice with the recorded dimensions
- A screenshot or printout of this result, with the date
- Photos of all six sides if the carrier claims damage or a nonrectangular shape
- Your scale and tape calibration notes, if you have them
How we got there
Questions
What is the difference between volumetric weight and dimensional weight?
They are the same calculation with different names. US parcel carriers say dimensional (DIM) weight; express and air freight say volumetric weight. Both divide a package's volume by a divisor and bill the greater of that figure and the actual weight.
When is the divisor 6,000 instead of 5,000?
5,000 cm³/kg is the express standard used by DHL, FedEx and UPS on international shipments. 6,000 cm³/kg is the IATA standard for general air cargo. Some economy services and contracts also use 6,000, and some use 4,000. Your service agreement sets the number.
How do I convert volumetric weight to pounds?
Divide the volume in cubic inches by 139 instead. 5,000 cm³/kg and 139 in³/lb are the same density: an 18 × 14 × 10 in box has a volumetric weight of 8.3 kg in metric, and 19 lb in imperial after the round-ups.
Sources
- DHL Express published volumetric weight guidance (5,000 cm³/kg; 139 in³/lb)
- IATA air cargo volumetric standard (6,000 cm³/kg)
- FedEx and UPS international service guides (5,000 cm³/kg)
Rules last checked November 12, 2026 · How we check every figure