Free calculator to calculate FBA fulfillment fee and your product size tier.
Our calculation is derived from Amazon's own documentation source. Taken from Amazon Seller Central on 4 September 2026: 2026 FBA fulfillment fees, Product size tiers, Ships in Product Packaging (SIPP). You need to be logged in to Seller Central to open these articles.
A unit takes the first tier whose every limit it stays within. Small standard is judged on unit weight; every tier above it on the greater of unit and dimensional weight — length × width × height ÷ 139, with the two smaller sides counted as at least 2 in.
Price bands are the item's selling price. Peak runs 15 October 2026 to 14 January 2027. All six rate cards are below: general, apparel and dangerous goods, each in its non-peak and peak season.
A flat 3.5% is added to the fulfillment fee above.
Charged on Small bulky and Large bulky units that are not SIPP-enrolled, because Amazon has to box them.