USPS Parcel Calculator
USPS Parcel Rate 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 USPS Parcel Rate 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 USPS Parcel Rate Calculator
Enter Length, Width, Height and Actual weight. 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, Actual weight, Nonrectangular parcel and Rate per pound or kilogram.
USPS is a trademark of its owner. CalculatorFox is an independent website and is not affiliated with, endorsed by or connected to USPS; this calculator is a general estimate and the official figures are the ones published by USPS.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
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Frequently asked questions
What are USPS parcel rates?
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 this page it is computed from Length, Width and Height and shown as Billable weight, Billed ounce increment and Dimensional weight.
How to calculate parcel cost?
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.
What are the USPS shipping rates by weight?
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.
What information do I need for the USPS Parcel Rate Calculator?
You need Length, Width, Height, Actual weight, Nonrectangular parcel, Rate per pound or kilogram, Base charge before weight and Fuel surcharge. 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 USPS Parcel Rate 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 USPS Parcel Rate 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.