FBA Size-Tier & Packaging-Weight Calculator

Model your true post-prep billable shipping weight—including Amazon’s packaging weight allowance, regional divisors (US ÷139, UK/EU ÷5,000, AU ÷4,000, Canada ÷5,000), and ceiling rounding.

1. Product & Marketplace Inputs

in
in
in
lb
lb

2. Post-Prep Billable Weight

FBA Billable Shipping Weight
7 lb
Raw DIM: 6.04 lb vs. Unit + Pkg: 3.45 lb (rounded up to next whole lb).
Progress inside current weight bracket 4% into bracket

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How Amazon FBA Adds Packaging Weight & Rounds Up

Many sellers calculate dimensional or cubic weight from bare factory specs and get surprised when FBA invoices a higher bracket. First, Amazon adds a packaging weight allowance (historically ~0.25 lb / 115 g for standard items and ~1.0 lb / 450 g for bulky items) to your unit weight before comparing it against volumetric weight.

Second, once the higher of unit weight or volumetric weight is selected, Amazon rounds up to the next whole pound in the US (so 6.04 lb bills as 7 lb) or the next 0.1 kg in UK, EU, Canadian, and Australian fulfillment centers.