FedEx Dimensional Weight Calculator
Estimate FedEx dimensional weight and billable weight by entering package length, width, height and actual weight. The divisor is editable for service-specific rules.
Divisors auto-fill from tracked public carrier rules and can be overwritten. FedEx commonly uses divisor 139 for inch/lb dimensional weight. Service-specific and contract rules may vary.
Your calculation: 16 x 12 x 10 / 139 = 13.82 lb.
FedEx formula
Dimensional weight = length x width x height / divisor.
Example: a 16 x 12 x 10 inch package has 1,920 cubic inches. With divisor 139, dimensional weight is 13.82 lb, so a shipment weighing 8 lb may bill at 13.82 lb or the carrier-rounded equivalent.
What divisor does the FedEx calculator use?
The default FedEx inch/lb divisor in ShipCalc is 139. You can overwrite it when a service, country or contract uses a different rule.
What is FedEx billable weight?
Billable weight is usually the greater of actual weight and dimensional weight. Use the calculator before quoting large lightweight parcels.