Shipping cost utility
Compare billable weight before you ship.
Enter one package. See how common dimensional-weight divisors change the weight a carrier may bill.
Comparison
Package volume
3,360 in³ Actual density: 9.3 lb/ft³That brings the Express-profile dimensional weight down to the actual package weight.
Transparent methodology
The calculation
Dimensional weight(Length × Width × Height) ÷ divisor
Billable weightGreater of actual or dimensional weight
Divisors are configurable because carrier rules, services, destinations, rounding, oversize fees, and customer agreements differ. The included 139/5,000 and 166/6,000 profiles are common planning references, not live quotes.
Confirm the divisor, rounding method, size limits, and surcharges in your current carrier agreement before purchasing postage.
Quick answers
Dimensional weight FAQ
Why can a light box cost more?
Large, light packages occupy vehicle and aircraft space. Dimensional weight converts that space into a comparable billing weight.
Should I round the dimensions?
Use the outside dimensions of the packed parcel. Carrier rules differ on how each side and the final weight are rounded, so verify your service guide.
Which divisor should I use?
Use the divisor in your current carrier agreement for the service and route. The custom profile lets you model that exact number.
Does this include oversize fees?
No. The calculator compares weight only. Additional handling, oversize, residential, fuel, zone, and other surcharges are separate.