Why dimensional weight decides your shipping bill
Carriers charge the greater of actual weight and dimensional (volumetric) weight. A light but bulky box is billed as if it were heavy. DIM weight = L × W × H ÷ divisor, where the divisor is typically 139 (in/lb) for UPS and FedEx daily rates and 5,000 (cm/kg) for DHL Express.
Frequently asked questions
Which DIM divisor should I use?
UPS and FedEx commonly use 139 for daily rates, USPS uses 166 for large packages, DHL Express uses 5,000 (cm/kg). Contract rates may differ — every divisor is editable.