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Free 2026 Amazon FBA profit and fee calculator - enter cost, price and weight to see net profit, margin and ROI.
Enter your numbers and watch your net profit, margin & ROI update live. Built for US Amazon FBA sellers. No sign-up.
Estimates only. Referral fee % of selling price; FBA, shipping & other costs are per unit. Verify exact fees in Amazon Seller Central.
Every FBA sale gets whittled down by fees before anything reaches you. Here is the exact math the calculator above runs:
Rule of thumb: aim to keep at least 20–35% of the selling price as profit. If fees + cost eat more than 80% of the price, the product is usually too thin to be worth stocking.
Beginners mix these up constantly. They answer two different questions, and a product can look great on one and weak on the other.
Measures how healthy the sale itself is. A $10.35 profit on a $25 sale = 41% margin. Aim for 20–35%+.
Measures return on the money you tie up per unit. Higher ROI means faster reinvestment and cash flow. Aim for 30%+.
Watch both: a low-price product can have a fat ROI but a thin margin, while a premium product can show a big margin but slower cash turnover.
Subtract all costs from your selling price: product cost, Amazon referral fee (about 15% of the sale price), the FBA fulfillment fee, inbound shipping, and any other per-unit costs (PPC, prep). What’s left is your net profit per unit.
Most successful US FBA sellers target a net profit margin of 20–35% and an ROI of 30%+ after all Amazon fees. Below a 15% margin, a single fee increase or return can wipe out your profit.
Two main fees apply: the referral fee (typically 15% of the selling price) and the FBA fulfillment fee (around $3.00–$6.00 for standard-size items based on size and weight). Monthly storage fees may also apply.
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