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Amazon FBA Profit Calculator

Calculate net profit, margin & ROI per unit — including FBA fees, referral fees, PPC and more.

1 Revenue

$

2 Product Cost

$
$

3 Amazon Fees

%
$

Small standard ≤4oz: $3.22 · ≤8oz: $3.40 · ≤12oz: $4.01 · ≤1lb: $4.22

$

4 Marketing & Other Costs

$
%
$
$

Net Profit / Unit

$0.00

Profitable

Margin

0.0%

ROI

0.0%

Monthly Profit

$0

Break-even Price

$0.00

Cost Breakdown

Total Costs $0.00
Revenue $0.00

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Why FBA Profit Is Harder to Calculate Than It Looks

Amazon FBA fees aren't a single flat percentage — referral fees vary by category, fulfillment fees depend on size tier and weight, and then there's storage fees, PPC advertising spend, and sometimes returns processing on top of all that. A seller comparing just "product cost vs. selling price" routinely overestimates their real margin, because the FBA-specific fee stack can eat 25-40% of the selling price before any profit is left. This calculator adds in every major FBA cost — product cost, selling price, FBA fulfillment fee, referral fee, and PPC spend — to show your actual net profit, margin, and ROI.

Net Profit, Margin, and ROI Are Different Numbers

Net profit tells you the dollar amount left after all costs. Margin tells you that profit as a percentage of the selling price. ROI (return on investment) tells you that profit as a percentage of what you actually spent on the product — a more useful number when comparing products with very different price points, since a $2 profit on a $5 product (40% ROI) is a very different opportunity than a $2 profit on a $50 product (4% ROI), even though the dollar profit looks the same.

免费亚马逊 FBA 利润计算器

输入产品成本、售价、FBA 配送费、佣金和广告（PPC）支出，本工具自动计算出净利润、利润率和投资回报率（ROI），帮助亚马逊卖家在选品和定价前快速评估真实盈利能力，完全免费，无需注册。

Frequently Asked Questions

What FBA fees does this calculator include?▼
Product cost, selling price, FBA fulfillment fee (based on size/weight tier), Amazon's referral/category commission, and your PPC advertising spend. Together these are the main cost components that determine your real per-unit profit on Amazon.
Why is my ROI different from my profit margin?▼
Margin measures profit against selling price; ROI measures profit against what you spent to acquire the product. ROI is generally the more useful number for deciding where to put limited inventory budget, since it reflects how hard your invested capital is working.
Does this account for storage fees?▼
This calculator focuses on the per-unit fulfillment, referral, and advertising costs that apply to every sale. Monthly storage fees are a separate, volume-dependent cost that's worth tracking alongside this per-unit calculation, especially for slow-moving or bulky inventory.
Is this a good tool for comparing products before sourcing them?▼
Yes — plug in the numbers for each candidate product and compare the resulting margin and ROI side by side before committing to inventory, which is a much faster sanity check than building a full spreadsheet model for every product you're considering.