Amazon FBA Calculator
Estimate your net profit, margin and ROI on Amazon in seconds. Enter a few numbers and the result updates as you type — everything runs in your browser.
Your estimate
Enter a selling price to see your estimated profit, margin and ROI.
Fee breakdown
What this calculator shows
Three figures tell you whether a product is worth selling:
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Net profit What's left per unit after Amazon's fees and all of your costs.
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Profit margin Net profit as a percentage of the selling price — your product's health.
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ROI Net profit as a percentage of product cost — how fast your investment returns.
Two products with the same margin can have very different ROI depending on cost: a $40 item with $10 profit is a 25% margin, but the ROI is 50% or 100% depending on whether it cost you $20 or $10 to source.
The full cost stack of an FBA product
Profit is what survives after every cost — not just Amazon's fees:
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Product / manufacturing cost What it costs to make or buy one unit.
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Freight & import duties Shipping to Amazon plus customs — easy to forget, and often significant.
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Referral fee Amazon's commission, usually 15% of the sale price.
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FBA fulfillment fee A per-unit pick, pack and ship charge based on size and weight.
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Storage fees Monthly warehousing — higher in Q4 (October–December).
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Returns, PPC & prep Refunds, advertising, and any prep or labeling per unit.
This calculator covers the core Amazon fees plus your product cost. Freight and PPC are the two costs new sellers underestimate most — add them under Extra costs for a true picture.
What's a good FBA margin and ROI?
Rough guideposts for screening a product:
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Margin under 15% Thin — little room left for PPC or returns.
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Margin 15–25% A workable range for established products.
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Margin above 25–30% Healthy — a buffer for advertising and scaling.
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ROI under 50% Often slow to recoup unless volume is high.
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ROI above 100% Strong — your capital turns over fast.
Margin tells you product health; ROI tells you cash-flow speed. Strong sellers watch both.
How to read your result
A $30 Home & Kitchen product that costs you $8 to source, standard-size FBA. The result below leaves room for advertising — a healthy candidate.
How to improve FBA profitability
A few levers move profit and ROI the most:
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Source cheaper or in larger volume A lower unit cost lifts ROI directly.
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Reduce dimensions and weight Dropping into a lower size tier cuts the FBA fulfillment fee.
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Strengthen your listing Better images and copy convert more, so every PPC dollar works harder.
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Pick products with margin built in Start from a healthy margin — a thin one is hard to fix later.
Looking to go further? Combine this with Listing Optimization and Product Research to compound your results on the same marketplace.
FBA profit & ROI: FAQ
Margin is profit ÷ selling price; ROI is profit ÷ product cost. Margin shows a product's health, ROI shows how fast your cash comes back. A product can have a strong margin but weak ROI, or the reverse.
The core calculation covers Amazon's fees and your product cost. Freight and import duties aren't separate fields — add them to Extra costs (or fold them into your product cost) for an accurate net profit.
As a rule of thumb, aim for 25%+ margin so advertising and returns don't wipe out your profit. Thinner margins leave little room for ad spend.
Yes. Referral percentages are current for 2026, FBA fulfillment fees increased on 15 January 2026, and the 3.5% fuel & logistics surcharge from April 2026 is applied — the same rate data the calculator uses.
Referral fee percentages are confirmed for 2026. FBA fulfilment fees shown are representative starting values per size tier and vary by exact weight band — verify your product's fee in Seller Central (Reports › Fulfilment › Fee Preview). A 3.5% fuel & logistics surcharge is applied on top of the FBA fee. Always confirm against Amazon's official fee schedules before making business decisions.
