Guides to paying less for FedEx shipping
How FedEx measures and bills a package, with worked examples on 2026 rates.
- How FedEx dimensional weight works, with real 2026 numbersThe dim weight formula, a worked example on 2026 FedEx Ground list rates, and four ways to stop paying to ship air.
- FedEx rounds every fraction of an inch up. Here is what it costs.Since August 18, 2025 FedEx rounds any fraction of an inch up to the next whole inch. See what that does to a 12-inch box and how to get back under the line.
- Dim divisor 139 vs 166 vs 194: what a better divisor is worthThe dim divisor in your FedEx contract changes the billed weight of every bulky package. Here is the math on one box at 139, 166, 194 and 225.
- Poly bag or box? How FedEx measures and bills soft packagingPoly mailers often bill at a lower weight than boxes, but a loose bag or an oversized one can cost more. How bags get measured and when to use one.
- The size and weight lines that trigger FedEx handling feesThe dimensions and weights where FedEx adds additional handling or oversize charges, what they do to billed weight, and how to stay under them.