Mathematical Basis & Formula Guide
This calculation model operates directly using continuous mathematical equations:
DIM Weight (lbs) = (Length x Width x Height in inches) / DIM Divisor (139 for FedEx/UPS).
Calculations are computed locally on your device with high-precision 64-bit IEEE floating-point arithmetic. No financial or personal parameters are transmitted to any remote analytics or storage server.
Frequently Asked Questions
Carriers use a volumetric divisor (typically 139 in North America or 5000 in metric) to calculate billing weight for lightweight bulky cartons.
Carriers charge based on whichever is greater: actual physical scale weight or calculated dimensional weight.