Honest, transparent calculators for Amazon sellers. Know your real FBA costs, profit margins, and advertising efficiency — based on Amazon's actual published fee structure.
Each calculator is built on Amazon's publicly available fee data. Results are estimates — we are always transparent about that.
Calculate your true profit when selling via Fulfillment by Amazon. Accounts for FBA fulfillment fees, referral fees, cost of goods, and inbound shipping.
General profit margin calculator for all Amazon sellers, including merchant-fulfilled (FBM) sellers. Calculate margins, markup, and monthly revenue projections.
Measure your Total Advertising Cost of Sales (TACoS) — the metric that shows how advertising affects your overall business health, not just ad performance.
Too many Amazon sellers discover their margins are too thin only after they have already ordered 500 units. Our calculators exist to prevent that mistake.
We are not affiliated with Amazon. We have no incentive to make the numbers look better than they are. Our goal is one thing: give you honest, accurate estimates so you can make informed decisions.
Important: All results are estimates based on Amazon's publicly available fee structure. Amazon updates fees periodically. Always confirm final fees in Amazon Seller Central before making purchasing decisions.
Whether you are researching your first product or managing an established Amazon business, these tools help you think clearly about profitability.
Validate product ideas before spending money on inventory. Understand FBA fees from day one.
Quickly compare the profitability of multiple product ideas side by side.
Use the TACoS calculator to measure the true business impact of your advertising spend.
Re-check margins when Amazon updates its fee structure to protect your profitability.
Understand the metrics that matter so you can use our calculators more effectively.
A clear explanation of what profit margin means for FBA sellers, what a good margin looks like, and how to improve yours.
Most sellers focus only on ACoS. Here is why TACoS gives you a much more complete picture of your advertising health.
FBA fees can be confusing. This guide breaks down every fee type — fulfillment, referral, storage — so you know exactly what you are paying.
Yes. All three calculators on P4Product are completely free to use. There is no registration, no sign-up, and no subscription required. Simply enter your numbers and get your results instantly.
Our calculators use Amazon's publicly published fee structures for FBA fulfillment fees and referral fees by category. The results are estimates and should be used as a planning tool. Amazon updates its fee structure periodically, and your actual fees may differ based on your specific product dimensions, account type, promotional status, and other factors. We always recommend verifying final numbers in Amazon Seller Central.
No. P4Product is a completely independent website. We are not affiliated with, endorsed by, or sponsored by Amazon.com, Inc. We use Amazon's publicly available pricing information to build our calculators, the same way any seller would when researching fees manually.
The FBA Profit Margin Calculator includes Amazon's FBA fulfillment fees — the fees Amazon charges to pick, pack, and ship your product from their warehouse. The general Profit Margin Calculator is designed for merchant-fulfilled (FBM) sellers who handle their own shipping, so it does not include FBA fulfillment fees but does include your own shipping costs and referral fees.
Most experienced Amazon sellers aim for a net profit margin of at least 15–20% after all fees and costs. A margin below 10% leaves very little room for advertising spend, returns, or fee increases. However, what is "good" depends on your business model, product category, and volume. Higher-priced products sometimes tolerate lower percentage margins because the absolute dollar profit per unit is still meaningful.
No. All calculations happen entirely in your browser using JavaScript. Your numbers are never sent to our servers, stored in a database, or shared with anyone. When you close or refresh the page, all entered data is cleared.
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