SmartKDP — Seller Insights for Amazon

KDP publishing insights on Amazon book pages: royalty and printing-cost math, BSR context, and quick links to SmartKDP tools.

SmartKDP adds the numbers a self-publisher needs to Amazon's own book pages. Open a paperback and you get its estimated sales and monthly royalty, worked out from the listed price, the sales rank, and the trim size and page count read off the listing — using the same printing-cost maths as our free calculators, not a rule of thumb. On a book's page Estimated daily sales and monthly royalty, the printing cost behind them, and every category rank listed with a link. Trim size and ink type are shown as editable fields, clearly marked, because Amazon's page does not state the ink type at all and its measured dimensions straddle KDP's large-trim boundary — both change the printing cost, so we show our assumption instead of hiding it. On search results A strip under each book with its rank, price, reviews, rating and format, plus a summary over the whole page: median price, review distribution, price band, and how much of the page is independently published. Enough to judge whether a niche is worth entering. On bestseller charts Rank against estimated sales across the top slots, with price and format spread and an estimated revenue summary — labelled gross retail, not author earnings, because those are very different numbers. Built to be honest about what it doesn't know Every statistic is shown with the sample it came from ("median from 11 of 16"). Where the page genuinely cannot support a figure, it says so rather than printing a zero or a dash. On a subcategory bestseller chart the sales-rank column stays empty until you ask for a deeper look, because a #1 in a subcategory is often ranked in the tens of thousands overall, and treating the chart position as a sales rank would be wrong by orders of magnitude. Yours to switch off Every overlay has a Hide link in its own header, one click from the settings page that turns it back on. Features, marketplaces, theme and diagnostics are all individually controllable. No account. No tracking. There is nothing to sign up for. The extension makes exactly two requests to us — one for its own configuration, one to turn a sales rank into an estimate — and neither carries the book you are looking at. Diagnostic events are counts and category labels, stored on your own machine, sent nowhere, and switchable off. Full detail: https://smartkdp.com/extension-privacy SmartKDP is an independent tool and is not affiliated with, endorsed by, or sponsored by Amazon.com, Inc. “Amazon”, “Kindle”, “Kindle Direct Publishing”, and “KDP” are trademarks of Amazon.com, Inc. or its affiliates.