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What you actually keep after Amazon's fees.

Type your price, cost, and fees. See real net profit per unit, your margin, and ROI — after COGS, FBA, and referral fees. Use it to decide whether a product is worth sourcing. Runs in your browser.

$
$
What you pay your supplier, per unit.
$
Estimate — find the exact fee on your listing in Seller Central. Typical small-standard items run ~$3–$6.
%
Most categories are 15%. Electronics/computers ~8%, apparel ~17%. Estimate — Amazon's schedule is the source of truth.
$
Cost to get one unit into Amazon (optional).
$
Optional. Amazon's monthly FBA storage fee per unit.
%
Optional. Estimated cost of returned units (lost COGS + fees), amortized across sales.
Net profit per unit
$12.13
What you keep on each sale after Amazon's fees and your costs — before advertising.
Profit margin
40.5%
ROI
161.8%
Total Amazon fees
$10.10
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This is one product. RedHen does all of them, live.

This calculator is an estimate from the numbers you type. RedHen syncs the real fees Amazon actually billed you and shows true net profit per product across your whole catalog — after COGS, FBA, referral fees, returns, and ad spend. Flat fee, never a percentage of your sales.

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Your margin decides the most a click can cost. Rules hold every keyword to that line, so your ads don't spend the profit this calculator just found. See our Amazon PPC automation rules, with every threshold.

Amazon FBA profit — common questions

How do I calculate Amazon FBA profit?

Start with your sale price and subtract everything Amazon and your supply chain take: COGS, the FBA fulfillment fee, the referral fee (a percentage of price), inbound shipping, storage, and a returns allowance. What's left is your net profit per unit before advertising.

What's a good profit margin on Amazon?

Many sellers aim for 15–30% net margin after all fees but before ad spend, leaving room to advertise and still profit. Thin-margin products can work at high volume, but they leave little cushion for PPC — which is exactly where sellers quietly lose money.

What is ROI on Amazon and how is it different from margin?

Margin is profit as a percentage of your sale price. ROI is profit as a percentage of the money you put into the unit (COGS plus inbound shipping). A product can have a modest margin but a strong ROI if it's cheap to source — ROI tells you how hard your cash is working.

Are these fee numbers exact?

The math is exact for what you enter, but FBA and referral fees are estimates until you pull the real figures from Seller Central — Amazon changes them per ASIN, sometimes without notice. RedHen syncs the actual fees Amazon billed you so your profit is the real number, not an estimate.

Does this include advertising cost?

No — this shows profit before ads, on purpose, so you can see whether the product is worth selling at all. To find your maximum ad spend, use our free break-even ACoS calculator next.

More free Amazon seller tools

30-Second PPC Audit
A–F grade, 0–100 score and estimated waste — no upload
PPC Waste Calculator
Your Search Term Report → wasted keywords + a copy-paste negative list
Break-Even ACoS Calculator
True max ACoS, target ACoS and max CPC — not the 25% rule
Break-Even Price Calculator
The lowest price that still covers every fee
PPC Budget Calculator
How much to spend on ads — monthly & daily
Agency Cost Calculator
Flat fee vs % of ad spend, with the crossover point

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