MarginPal — Amazon FBA Profit Calculator

Estimate FBA profit, ROI & break-even on any Amazon product page. Profit badges on every search result. Watchlist + CSV export.

MarginPal shows you the real numbers before you commit to inventory. Opening any Amazon product page, MarginPal estimates your net profit, margin, ROI, break-even price and a suggested minimum price — using Amazon's published FBA fee schedules (referral, fulfillment tier, storage), refreshed automatically every 12 hours across 12 marketplaces (US, CA, UK, DE, FR, IT, ES, NL, SG, AU, AE, JP). ▸ PRODUCT PAGE PANEL Net profit, margin, ROI, break-even, suggested minimum price, FBA vs FBM comparison, plus sourcing signals: Best Sellers Rank with a rough monthly-sales range and competing offer count. Price history chart (Keepa) one click away. ▸ SEARCH-RESULT BADGES Green or red profit pills on Amazon search results, computed from your own cost assumptions — scan fifty products in the time a calculator website does one. ▸ WATCHLIST + CSV EXPORT Save products with their numbers and your supplier notes. Group, search, and export everything to CSV. ▸ HONEST ESTIMATES All figures are estimates from public fee schedules — labeled "EST" everywhere. Not official Amazon data; verify big decisions in Amazon's Revenue Calculator. FREE TIER (forever, no account): 5 calculations/day, badges on first 3 results, 10-item list. PRO ($9/mo or $79/yr): unlimited everything + CSV export. 7-day money-back guarantee. Works on 12 marketplaces: US, CA, UK, DE, FR, IT, ES, NL, SG, AU, AE, JP