Amazon FBA Fees Calculator
Estimate Amazon FBA fulfillment fees based on your product's weight, package volume, and base rate tier. Helps sellers protect margins before listing a new product.
About this calculator
Amazon FBA (Fulfillment by Amazon) charges sellers a fee for picking, packing, and shipping each order. The estimated fee formula used here is: FBA Fee = baseRate + (weight × 0.4) + (dimensions × 0.01), where weight is in pounds and dimensions is the package volume in cubic inches. The base rate reflects the size tier Amazon assigns to your product (e.g., small standard, large standard, oversize). The per-pound component accounts for shipping weight costs, while the volumetric component captures dimensional weight charges for bulky items. Understanding your estimated FBA fee before listing lets you set a minimum viable sale price that still leaves an acceptable profit after Amazon's cut, referral fees, and your own cost of goods.
How to use
Suppose you are selling a kitchen gadget weighing 1.5 lbs, with a package volume of 200 cubic inches, and your product falls into a base rate tier of $3.00. Enter Base FBA Rate = $3.00, Product Weight = 1.5 lbs, Package Volume = 200 cubic inches. The calculator computes: FBA Fee = 3.00 + (1.5 × 0.4) + (200 × 0.01) = 3.00 + 0.60 + 2.00 = $5.60. You now know your fulfillment cost is approximately $5.60 per unit, and you can add your cost of goods and referral fee to establish a profitable selling price.
Frequently asked questions
How does Amazon calculate FBA fulfillment fees for standard size products?
Amazon assigns each product to a size tier based on its unit weight and longest-side dimensions when packaged. Small standard, large standard, and various oversize tiers each carry a different base rate. Within a tier, the fee increases with weight using a per-pound or per-ounce rate above a threshold. Amazon also considers dimensional weight — volume divided by a divisor — and charges whichever is greater between actual and dimensional weight. Always verify your fee with Amazon's official FBA Revenue Calculator, as rates are updated periodically.
What other Amazon seller fees should I account for beyond FBA fulfillment fees?
FBA fulfillment fees are just one component of your total Amazon selling cost. You also pay a referral fee, which ranges from 6% to 45% of the sale price depending on category (most categories are 8–15%). If you use Professional selling plan there is a $39.99/month subscription; Individual sellers pay $0.99 per item sold instead. Additional charges include long-term storage fees for inventory held over 365 days, removal order fees, and optional advertising costs. Netting all of these against your sale price and cost of goods gives your true unit economics.
When does it make sense to use FBA versus fulfilling orders yourself (FBM)?
FBA is generally advantageous when your products are small, light, and fast-moving, because Amazon's logistics network offers competitive per-unit rates at volume and grants your listings Prime eligibility, which significantly boosts conversion. FBM (Fulfilled by Merchant) becomes attractive for heavy, bulky, or slow-moving items where FBA storage fees accumulate, or for sellers who already have efficient in-house fulfillment infrastructure. Some sellers run hybrid strategies — FBA for best-sellers and FBM for slow movers — to minimize storage fees while retaining Prime status on core SKUs. Calculating your FBA fee upfront is the first step in making this decision objectively.