Shipping FedEx Calculator
FedEx Shipping Calculator works out Billable weight and Billed ounce increment from Length, Width and Height. The default figures on this page give billable weight of 16; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Dimensional weight = 2160 / 139 = 15.54, rounded up to 16 lb.
- Billable weight is the greater of the billed scale weight (8) and dimensional (16): 16 lb.
- Length plus girth = 18 + 2 x (12 + 10) = 62.
- Density 6.4 lb per cubic foot puts this in NMFC class 150.
Its 17 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
11 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the FedEx Shipping Calculator calculates
Computes billable weight from actual and dimensional weight, checks size and girth limits, applies surcharges and prices the shipment from a supplied or provider-sourced rate.
How to use this FedEx Shipping Calculator
Enter Length, Width, Height and Dimension unit. Billable weight updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Billable weight, Billed ounce increment and Dimensional weight.
The method follows UPS Rate and Service Guide, dimensional weight calculation, UPS Shipping Dimensions and Weight (150 lb, 108 in length, 165 in length plus girth), FedEx Service Guide, dimensional weight, USPS Domestic Mail Manual 123, Priority Mail prices and dimensional weight and USPS Domestic Mail Manual 133, First-Class Mail and USPS Ground Advantage prices and dimensional weight.
What you can compare
Change one input at a time to see how it affects Billable weight, Billed ounce increment and Dimensional weight. The inputs you can vary are Length, Width, Height, Dimension unit, Actual weight and Weight unit.
FedEx is a trademark of its owner. CalculatorFox is an independent website and is not affiliated with, endorsed by or connected to FedEx; this calculator is a general estimate and the official figures are the ones published by FedEx.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I estimate FedEx shipping costs?
Computes billable weight from actual and dimensional weight, checks size and girth limits, applies surcharges and prices the shipment from a supplied or provider-sourced rate. Open “How this is worked out” beside the result to see each step for your own figures.
Is it cheaper to send by USPS or FedEx?
Computes billable weight from actual and dimensional weight, checks size and girth limits, applies surcharges and prices the shipment from a supplied or provider-sourced rate. On the figures this page opens with — length 18, width 12 and height 10 — the billable weight is 16. Put your own figures in their place and the working updates beside the result.
How does FedEx charge by weight or size?
It needs Length, Width, Height, Dimension unit, Actual weight and Weight unit. Nothing else is required, and the figures stay in your browser.
How can I check FedEx shipping rates?
The result gives Billable weight, Billed ounce increment, Dimensional weight, Actual weight, Which weight is billed and Dimensional divisor applied, each labelled with its unit so the figure can be read on its own.
What information do I need for the FedEx Shipping Calculator?
You need Length, Width, Height, Dimension unit, Actual weight, Weight unit, Dimensional divisor override and Nonrectangular parcel. The page opens with default figures that give billable weight of 16, so you can see the scale before entering your own.
What does this FedEx Shipping Calculator show?
It shows Billable weight, Billed ounce increment, Dimensional weight, Actual weight, Which weight is billed, Dimensional divisor applied, Cubic size and Length plus girth, with the working and any warnings for your entries.