Reseller Profit Calculator

Compare net profit across eBay, Etsy, Facebook Marketplace, Mercari, Poshmark, and Amazon after all fees.

FlipCalc (Reseller Profit Calculator) instantly compares your real take-home profit across major marketplaces after fees. Enter: • Cost of goods • Selling price • Shipping cost • Choose whether buyer or seller pays shipping Then FlipCalc shows results for: • eBay • Etsy • Facebook Marketplace • Mercari • Poshmark • Amazon PLUS add your own platform with your own fees What you get (per platform): • Net Profit (and highlights the best option) • Total Fees • Profit Margin % • ROI % • Net Revenue • Tap to expand a full fee-by-fee breakdown Sort results by: • Highest Profit • Highest Margin • Highest ROI • Lowest Fees Custom fee settings You can edit platform fee values in Settings and turn platforms on/off to match your seller accounts and scenarios (promoted listings, flat fees, thresholds, processing fees, FBA, and more). Privacy No accounts. No tracking. No network calls. Your inputs and fee settings stay in your browser (stored via Chrome storage). Disclaimer Marketplace fees and policies can change. FlipCalc provides estimates—always confirm final fees inside the platform before listing.