Amazon FBA Profitability Calculator
Estimate your net profit on any Amazon FBA listing by factoring in referral fees, fulfillment fees, and product cost. Use it during product research to avoid listings with thin or negative margins.
About this calculator
Amazon FBA profit is what remains after deducting every fee layer from your selling price. The formula used here is: profit = sellingPrice − productCost − (sellingPrice × referralFeeRate / 100) − (weight × dimensions × 3.22) − 0.30 − 1.80. The referral fee is a percentage of the selling price, typically 8–15% depending on category. The fulfillment fee is estimated from the product's weight and a size-category multiplier times $3.22 per unit. The fixed charges of $0.30 and $1.80 represent per-unit pick-and-pack and storage components. Understanding each deduction helps sellers set a selling price that preserves a viable margin after Amazon takes its share.
How to use
Assume a selling price of $25.00, product cost of $6.00, weight of 0.5 lbs, size dimension factor of 1, and a referral fee rate of 15%. Step 1 — referral fee: $25.00 × 0.15 = $3.75. Step 2 — fulfillment fee: 0.5 × 1 × $3.22 = $1.61. Step 3 — fixed fees: $0.30 + $1.80 = $2.10. Step 4 — profit: $25.00 − $6.00 − $3.75 − $1.61 − $2.10 = $11.54. Your net FBA profit per unit is $11.54, a margin of about 46%.
Frequently asked questions
What is the Amazon referral fee and how does it affect FBA profitability?
The referral fee is a percentage of the total selling price that Amazon charges for each sale, covering use of their marketplace. Rates typically range from 8% on electronics to 15% on most general merchandise and as high as 20% on some categories. Because it scales with price, a higher selling price produces a higher absolute referral fee. Always verify the current rate for your specific category in Amazon's fee schedule before making sourcing decisions.
How do I calculate Amazon FBA fulfillment fees for a new product?
FBA fulfillment fees depend primarily on the unit weight and the size tier—standard-size or oversize—as defined by Amazon. Heavier and larger items fall into higher fee brackets, which can quickly erode margins on low-priced products. This calculator approximates the fee using weight × size category × $3.22, giving a useful estimate for product research. For the exact fee, use Amazon's official FBA Revenue Calculator with the specific ASIN or dimensions.
Why do Amazon sellers include storage fees when calculating FBA profit?
Inventory sitting in Amazon's warehouses incurs monthly storage fees, which become a per-unit cost once you factor in your average sell-through rate. Slow-moving inventory accumulates fees that are not reflected in a single-unit calculation. Including a per-unit storage estimate—especially for seasonal products—prevents surprises that make a seemingly profitable product actually break even or lose money over time.