FedEx uses the most common divisor in the US shipping industry (139 cubic inches per pound) across nearly all its services. The only exception is FedEx Ground at retail walk-in rates, which uses a more favorable divisor of 166.
Awaiting dimensions. Enter package details to compute billable weight.
| Service | Imperial (in/lb) | Metric (cm/kg) | Notes |
|---|---|---|---|
| Ground / Home Delivery (Daily) | 139 | 5000 | All packages |
| Ground / Home Delivery (Retail) | 166 | 5000 | Counter shipments |
| Express (Overnight, 2-Day) | 139 | 5000 | All packages |
| International (Express + Economy) | 139 | 5000 | All packages |
Time-sensitive shipments, reliable air network, international Express
Lightweight bulky items (DIM weight hits hard at 139)
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FedEx uses a divisor of 5000 cm³/kg (metric) or **139 in³/lb** (imperial). The DIM weight formula is volume divided by this number, rounded up to the nearest whole pound or kilogram.
FedEx applies dimensional weight to packages above No minimum. The billable weight is always the greater of the actual weight or the calculated DIM weight.
Use right-sized packaging — every cubic inch you save is divided by the divisor and removed from your billable weight. Avoid excessive void fill and consider custom box sizes for products you ship frequently. For occasional shippers, use the calculator above to test packaging changes before you commit to new materials.