FedEx U.S. parcel: use the current guide
The 2026 FedEx Service Guide, pages 135–136, uses divisor 139 for the parcel scenario shown here and rounds fractional inches upward. Specialized freight products can use different rules.
Reproduce the example
For 20 × 15 × 10 in and actual weight 12 lb, 3000 ÷ 139 = 21.5827…; the whole-pound base comparison is 22 lb. Entering 20.1 in as length rounds it to 21 in: 3150 ÷ 139 rounds to 23 lb.
Scope and limits
The comparison is a planning calculation for rectangular parcels, not a rate quote. Additional handling, large-package minimum weights, oversize pricing, service eligibility and negotiated terms are not calculated. Measure the finished package and verify the exact service before booking.
Reproduce the calculation
Use the related Cargoivo calculator with your own shipment dimensions, weight, or quantity.
Open Dimensional Weight Calculator →Cargoivo provides educational planning information, not a freight quote, engineering approval, customs advice, or carrier commitment. Verify current service rules, equipment specifications, and commercial terms before shipping.