1 Package Visualization
The box updates dynamically based on your current length, width, and height inputs.
Shipping Tools
DIM Weight Calculator
Use our DIM (Dimensional Weight) calculator to compare actual weight vs. dimensional weight and find the billable weight for better shipping rate decisions.
2 DIM Weight Calculator
3 DIM Weight Result
Actual Weight
0.000 lb
(0.000 kg)
DIM Weight
0.000 lb
(0.000 kg)
Charged Weight
Billable Weight
0.000 lb
(0.000 kg)
DIM Calculation: (L × W × H) ÷ DIM Factor = DIM Weight
DIM Factor Used: 139
DIM Factor
5000 (≈ 138.40 in/lb)
DIM Factor Conversion Tool
Popular conversions
What Is Dimensional Weight
Dimensional weight (also called volumetric weight) estimates shipping weight from parcel size. Carriers use it to account for vehicle and sortation space, not only physical mass.
For eCommerce and 3PL teams, this means oversized but lightweight parcels can be billed higher than expected if package dimensions are not optimized.
How Billable Weight Works
Billable weight is the greater of actual weight and DIM weight. If package volume creates a larger DIM value, carriers usually bill using DIM weight.
Billable Weight Rule The greater of actual weight and dimensional weight
DIM Factor Reference
Carrier and service-level DIM factors can differ from common industry approximations.
View DIM Factor TableDIM Factor Reference Table
These are common industry approximations. Actual DIM factors may differ by carrier and service.
| DIM Factor (in³/lb) | DIM Factor (cm³/kg) |
|---|---|
| 139 | 5000 |
| 166 | 6000 |
| 194 | 7000 |
| 220 | 8000 |
| 250 | 9000 |
DIM Weight Explanation
Carriers usually bill by the greater of actual weight and dimensional weight, so parcel size directly affects billable weight.
| Formula mode | Calculation |
|---|---|
| inch / lb | DIM Weight (lb) = (Length × Width × Height) ÷ DIM Factor |
| cm / kg | DIM Weight (kg) = (Length × Width × Height) ÷ DIM Factor |
Actual weight vs DIM weight
Actual weight is the physical scale weight, while DIM weight is calculated from package size. Billing usually uses the larger value.
How billable weight works
Billable weight is max(actual weight, dimensional weight). Use this value as your primary cost reference.
- Use this tool first, then submit your profile in rate comparison.
- If packaging variance is high, combine this with the Shipping Calculator.
- Review the carrier directory and USPS page to align DIM impact with carrier fit.
- For system integration, explore the Shipping API or book a demo.
FAQ
What is dimensional weight?
Dimensional weight is a billing method based on parcel volume instead of actual weight.
How do you calculate dimensional weight?
Use Length × Width × Height ÷ DIM Factor, then compare against actual weight in carrier billing rules.
What is the difference between actual weight and dimensional weight?
Actual weight is measured on a scale, while dimensional weight is calculated from package dimensions and DIM factor. Billing usually uses the higher value.
How do carriers determine billable weight?
Carriers usually compare actual and dimensional weight, then charge based on the higher value.
What DIM factor should I use?
Start with common presets, then confirm the exact DIM factor from your carrier and service policy.
Why is 139 commonly used?
139 is a widely used reference factor in U.S. parcel services, but the final DIM factor depends on carrier and service type.
Is dimensional weight the same as volumetric weight?
Yes. In most logistics contexts, dimensional weight and volumetric weight refer to the same billing concept.
Do USPS and other carriers always use the same DIM factor?
No. DIM factors can vary by carrier, service, destination, and contract terms, so confirm with the active billing policy.
Need a cost review based on parcel dimensions?
Submit your shipment info and our DIM experts will give a more precise rate comparison recommendation.
