Amazon Size Tier & FBA Fee Estimator
Determine which Amazon FBA size tier your product falls into and get an estimated fulfillment fee based on 2026 US rates.
Free foreverNo signup requiredInstant results
Package Dimensions & Weight
in
Longest side of the packaged product
in
Second longest side
in
Shortest side
lbs
Enter in pounds (e.g. 0.5 = 8 oz, 1.25 = 1 lb 4 oz)
Results
Enter dimensions and weight, then click Calculate
How This Works
Amazon assigns every FBA product a size tier based on its packaged dimensions and weight. The tier determines your fulfillment fee.
Dimensions are sorted so the longest side is L, median is M, and shortest is S. Small Standard uses ounces; all other tiers use pounds.
Girth (used for Large Bulky) = 2 × (M + S). If girth exceeds 130" the product does not qualify for Large Bulky and falls into Extra-Large.
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