FedEx DIM Weight Calculator

Calculate FedEx dimensional weight with correct rounding rules. DIM divisor 139, dimensions rounded up to next inch.

Units
Package Dimensions
in
in
in
lb

FedEx Rounding Rules

  • DIM divisor: 139 in³/lb
  • Each dimension rounded UP to the next whole inch
  • Billable weight = ceiling of max(actual, DIM)
  • Final weight rounded to whole pounds

Note: Rules may vary by service type, account agreements, and destination. View official FedEx documentation →