Free Amazon Seller Tools & Calculators
Precision client-side calculators and audit utilities for US, UK, and EU Amazon sellers. Analyze advertising efficiency, calculate net VAT margins, audit search terms, and test listing compliance in seconds.
ACoS & TACoS Calculator
Calculate break-even ACoS, campaign ACoS, TACoS, and net profit per unit after ads across US, UK, and European marketplaces with optional VAT deduction.
UK & EU VAT Margin Calculator
Convert VAT-inclusive retail prices to net selling prices, extract exact tax amounts, and calculate net contribution margin for Amazon UK and European stores.
FBA Profit & Fee Calculator
Model true net profit, ROI, and total Amazon take rates per unit. No hardcoded fee schedules, 100% custom inputs for referral, fulfillment, storage, and placement fees.
PPC Search Term Report Audit
Drop your Sponsored Products search term report (CSV/XLSX) for instant in-browser analysis. Identifies zero-order wasted spend, high ACoS bleeders, and keyword harvest winners.
Listing Quality & Policy Checker
Test titles, bullet points, descriptions, and backend search terms against official Amazon style guides. Checks byte limits, prohibited promo words, and formatting rules.
Net Profitability Calculator
Our flagship unit-economic model tracking referral fees, returns cost, monthly storage, FBA shipping, and advertising deductions down to the exact dollar.
Engineering Principles Behind SellerVine Tools
Most online Amazon calculators either push inaccurate static fee charts or require an email capture wall to view results. SellerVine builds open client-side utilities engineered with three strict guidelines:
Recommended Strategy Guides
TACoS vs ACoS: The Real Growth Metric
Why judging campaigns strictly by ACoS hides true profitability and how to manage whole-account TACoS.
UK & EU ExpansionAmazon EU & UK VAT, IOSS & Compliance
How marketplace deemed-supplier rules, £135 consignment limits, and OSS work for international sellers.
PPC StrategyNegative Keyword Sculpting Blueprint
Eliminate wasted ad spend by systematically filtering non-converting search queries across SP and SB.
Frequently Asked Questions
Are these Amazon seller tools completely free?
Yes. Every tool in SellerVine's suite is 100% free with no email requirement, no account sign-up, and no subscription fees. We build these tools to help brand owners make data-backed operational decisions.
Is my Amazon financial and advertising data secure?
Yes. Every tool runs 100% client-side in your web browser. Neither your sales numbers, fee inputs, nor uploaded search term reports are transmitted to any server or third party. You can verify this by inspecting network activity in your browser developer tools.
Do these calculators support international Amazon marketplaces?
Yes. Our calculators support the United States (USD), United Kingdom (GBP), and European Union marketplaces (Germany, France, Italy, Spain in EUR), including accurate VAT handling for European stores.
How often are the calculation formulas and rules updated?
Our models are reviewed and updated regularly against active Amazon fee schedules, HMRC UK guidelines, and EU regulations. General information, not legal or tax advice. Last reviewed: 15 October 2026.