About FBACalculator.top

Free online tools for marketplace sellers — no signup, no uploads, no paywalls.

What This Site Is

FBACalculator.top is part of a small collection of free online calculators and utilities built for people who sell things online. This particular tool answers one question that millions of Amazon sellers ask every time they evaluate a product: “After all of Amazon's fees, what do I actually keep?”

Enter your selling price, product cost, package dimensions and weight, and the calculator applies the 2026 US Amazon rate card — the category referral fee, the FBA fulfillment fee for your size tier and price band (including the Low-Price FBA band under $10), the 3.5% fuel and logistics surcharge, and monthly storage — to show net profit, margin, ROI and the break-even selling price. A dedicated mode compares FBA against fulfilling orders yourself (FBM) side by side. Scenarios can be saved and shared as URL links.

Why We Built It

Amazon's official fee tools are buried inside Seller Central and require a seller account to use. The public fee documentation spans several pages and dozens of weight bands, and the 2026 schedule adds new wrinkles — three price bands, a new small bulky size tier, and a fuel surcharge — that make mental math unrealistic. We wanted a tool that works instantly, in any browser, without an account, and that keeps every number you type on your own device.

How It Works

• One data file: the entire rate card lives in a single maintainable JSON file (fees.json), compiled from Amazon's public Seller Central fee pages. When Amazon announces changes, we update that one file.
• Runs in your browser: all calculations are done by JavaScript on your device. Nothing you enter is uploaded, logged, or stored on our servers — see the Privacy Policy.
• Free and open: every tool on this site is free to use without registration, and always will be.

Accuracy & Independence

FBACalculator.top is an independent tool and is not affiliated with, endorsed by, or sponsored by Amazon.com, Inc. "Amazon" and "FBA" are trademarks of Amazon.com, Inc. or its affiliates. Fee rates are compiled from public Seller Central documentation and are believed accurate as of the date shown on the calculator page, but Amazon can change rates at any time — always confirm final figures with the Revenue Calculator or Fee Preview in your own Seller Central account before making inventory or pricing decisions.

Related Tools

Sell on more than one marketplace? You may also find our Etsy fee calculator useful: SellerFeeCalc.top — listing, transaction, payment processing and Offsite Ads fees for Etsy sellers.

Contact

Spot a rate that looks out of date, or have a feature request? We'd genuinely like to hear about it — see the Contact page.