Dimensional Weight Calculator
Compute a package's dimensional weight from its size and divisor, and see whether dim or actual weight gets billed.
Processed locally in your browser — nothing is uploaded.
139 for major US carriers' retail rates; some accounts get 166.
Enter the package dimensions and actual weight.
About Dimensional Weight Calculator
Carriers bill the greater of a package's actual weight and its dimensional weight — volume divided by a divisor. Enter the box dimensions and actual weight, pick the divisor (139 in³/lb is standard for US domestic retail rates, 5000 cm³/kg internationally, both editable), and see the dim weight, which weight applies, and the billable result rounded up the way carriers round.
Common uses
- Predict shipping cost for a light, bulky box before printing a label
- Decide whether a smaller box drops you a billable-weight tier
- Compare domestic vs international billable weight for the same package
Example
Input
20 × 15 × 10 in, 10 lb actual, divisor 139
Output
Dim weight 22 lb → billed at 22 lb
Limitations
- Divisors and rounding rules vary by carrier, service, and negotiated account, and they change — the defaults are common published values, not a quote.