Cost Ship Calculator
Cost to ship calculator works out Billable weight and Billed ounce increment from What is being shipped, Length and Width. 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 cost to ship 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 cost to ship calculator
Enter What is being shipped, Length, Width and Height. Billable weight updates as you type, and “Use a worked example” loads checked figures you can adjust. 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.
Dimensional weight of an 18x12x10 inch box at divisor 139 example
With Length: 18, Width: 12, Height: 10, Actual weight: 8, the calculator returns Cubic size: 2160, Dimensional weight: 16, Billable weight: 16. This example is checked against an independent source in the test suite.
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 What is being shipped, Length, Width, Height, Dimension unit and Actual weight.
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 figure out how much it will cost to ship a package?
On the figures this page opens with — length 18, width 12, height 10 and actual weight 8 — the billable weight is 16. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How do I calculate my shipping fee?
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.
How much would it cost to ship 100 lbs?
It needs What is being shipped, Length, Width, Height, Dimension unit and Actual weight. Nothing else is required, and the figures stay in your browser.
What information do I need for the cost to ship calculator?
You need What is being shipped, Length, Width, Height, Dimension unit, Actual weight, Weight unit and Carrier and service. 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 cost to ship 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.
Can I check how the cost to ship calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.