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Calculate ecommerce product profit, fees, costs, ROI and currency conversions while browsing supported marketplaces. MarginScout is an ecommerce profit calculator designed for global online sellers. Analyze product profitability directly while browsing supported marketplace product pages. Key features: • Automatically detects supported product information such as product title and selling price. • Calculate net profit and profit margin. • Calculate ROI on COGS and break-even CPA. • Add product cost (COGS), shipping, platform fees, payment fees, advertising costs and affiliate commissions. • Add optional costs including fulfillment, storage, taxes and duties, return loss, packaging and labor. • Convert product prices and costs between multiple currencies. • View reference FX rates, data source and last update time. • Supports multiple interface languages. • Designed for Amazon, 1688 and Temu product analysis. MarginScout uses a local-first approach. Your manually entered cost data and preferences are primarily stored locally in your browser. MarginScout helps sellers answer a simple but important question: How much profit is really left after all costs?
Aug 22, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.