FBA Profit Radar has two parts: a small calculator that lives right on Amazon product pages (that's the whole point — no tab-switching), and a Settings panel for your preferences and your Pro license. Here's how they fit together.
Go to a product page on any of the 12 supported marketplaces (amazon.com, amazon.com.br, amazon.co.uk, amazon.de, amazon.fr, amazon.it, amazon.es, amazon.ca, amazon.com.mx, amazon.co.jp, amazon.in or amazon.com.au). On the right edge of the page you'll see a small vertical tab that says "Profit Radar". Click it to slide the calculator panel out.
Price, category and (when FBA/DBA is selected) weight are scraped straight from the page you're looking at. If Amazon's layout hides one of them, the panel tells you and lets you type it in manually — the calculation still works, it just won't be automatic for that field.
Fill in your product cost (COGS), your seller tax rate, and pick FBA, DBA or FBM as the fulfillment method. For FBA/DBA you can override the package size; for FBM you enter your own shipping cost to the buyer. Add any other per-unit costs (packaging, prep, etc.) if you have them.
As you type, the panel recalculates: Amazon's referral fee, the fulfillment fee, your net profit, your margin on sales, and ROI. Switch between FBA, DBA and FBM to see which one actually nets you more on this specific product — not a generic industry average.
Below the results, "Max supplier price" shows the highest price you could pay a supplier and still hit 15%, 25% or 35% margin, calculated backwards from the numbers you already entered. This is a Pro feature — free accounts see it blurred with an unlock button; Pro accounts see the live numbers.
Click the ⚙ icon in the calculator panel (or the extension icon in your toolbar) to open the Settings side panel. There you can set your interface language, your default marketplace and seller tax, and — on Pro — override any category's referral fee percentage if Amazon changes its rates before this extension's built-in tables are updated.
Buy a plan from the pricing page. Right after checkout you'll see your license key on screen — copy it, open the Settings side panel, paste it into the "License key" field and click Activate. Pro features unlock immediately, no reinstall needed.
Full FBA/DBA/FBM calculator, referral and fulfillment fees, net profit, margin, ROI, all 12 marketplaces, 29 languages.
The reverse supplier-price calculator (15/25/35% margin targets) and an editable referral fee table per category.
Everything runs in your browser. The only network calls are checking your Pro license and, if you buy, processing payment via Stripe.
Questions? See our Privacy Policy and Terms of Service, or head back to the homepage.