A divisor is a conversion factor, not a universal constant. Always obtain the current value from the carrier, service, marketplace, or account agreement.

Definitions and operating notes

Inch-pound form
Cubic inches divided by an applicable in³/lb divisor produces pounds.
Metric form
Cubic centimeters divided by an applicable cm³/kg divisor produces kilograms.
Example 139
A commonly encountered in³/lb example; it is not guaranteed for any shipment.
Example 166
Another historically common in³/lb example; verify before use.
Example 5000
A commonly encountered cm³/kg example; rules and rounding still vary.
Rounding
Carriers may round dimensions, dimensional weight, or billable weight differently.
Actual weight
Scale weight may be compared with dimensional weight under the service rules.
Verification
Use the current official tariff, service guide, platform rule, or account terms.
Reference note. Confirm current supplier and carrier specifications before using a term or value operationally.

Last reviewed: July 26, 2026