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Home/Seller Tools/All Tools
Free Seller Tool

Free Seller Tools & Profit Calculators

Six free calculators built for marketplace sellers — Amazon FBA, eBay, Etsy, Walmart, TikTok Shop and break-even analysis. Instant answers, no signup, no spreadsheets.

Amazon FBA Profit Calculator

See your true per-unit profit after referral fees, FBA fulfillment, storage and ad spend — plus margin, ROI and break-even price. Built on 2026 fee ranges.

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eBay Fee Calculator

Final value fees, per-order fees, store-subscription discounts and promoted listing ad rates — know exactly what eBay keeps before you list.

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Etsy Fee Calculator

Listing, transaction, payment processing and offsite ad fees broken down line by line. Essential for pricing handmade and digital products.

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Walmart Marketplace Fee Calculator

Category referral fees on every Walmart sale, with the 2026 minimum fee floor flagged so low-price items never surprise you.

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TikTok Shop Fee Calculator

Platform commission plus the creator affiliate cut — model the real cost of TikTok Shop's creator-driven sales before you set commissions.

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Break-Even Calculator

Fixed costs, variable costs, price: get the exact units and revenue you need to break even, with a visual profit chart.

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Why sellers use these calculators

Marketplace fees quietly eat 10–40% of every sale. A product that looks profitable at a glance can lose money once referral fees, fulfillment, storage, payment processing and ad costs stack up. These tools model the full cost stack so you can price with confidence, compare marketplaces, and spot losing products before you invest in inventory.

Every rate is editable and every default is labeled. Fees change — we track publicly reported 2026 schedules and mark anything we could not verify as an estimate.

Frequently asked questions

Are these seller tools really free?
Yes — every calculator on this page is free to use with no account, no signup and no limits. We built them to help sellers price profitably; if you want help running the numbers across your whole catalog, that's what our free store audit is for.
How accurate are the fee defaults?
Defaults reflect publicly reported 2026 marketplace fee schedules (Amazon, eBay, Etsy, Walmart, TikTok Shop) from seller news and fee guides. They are starting points, not quotes — every rate field is editable so you can plug in your exact category rates from your seller dashboard.
Do my numbers leave my browser?
No. All calculations run locally in your browser with JavaScript. Nothing you type is sent to our servers.

Want higher margins without the guesswork?

Our team manages Amazon, eBay, Walmart, TikTok Shop and Etsy accounts end-to-end — pricing strategy, PPC, listings and operations. Get a free audit of your store first.

Get Your Free Store Audit