BSR(Best Sellers Rank)
Also called: Amazon BSR, Best Sellers Rank, sales rank
Definition
BSR (Best Sellers Rank) is Amazon's hourly-updated rank of every product against all others in its top-level store. For KDP coloring books, BSR sits in the Books store and approximates how recently a book sold. Lower number means more recent sales. BSR of 100,000 in Books equals roughly 2 to 3 sales per day.
What is BSR?
BSR is the Best Sellers Rank, Amazon's hourly-updated ranking number that approximates how recently a product sold relative to every other product in the same top-level store. A coloring book with BSR 50,000 in the Books store has sold more recently than a book with BSR 500,000.
How is BSR calculated?
Amazon does not publish the exact formula. The known pattern is that recent sales weigh most, prior sales contribute a decaying tail, and BSR refreshes hourly. A single sale will move a book's BSR sharply for a few hours, then it drifts back as other books sell.
What BSR should a new KDP coloring book target?
A coloring book with BSR under 100,000 in Books sells roughly 2 to 3 copies per day. Under 50,000 sells 4 to 8 per day. Under 20,000 sells 10+ per day. Most published KDP coloring books never break BSR 500,000; the books that hit five-figure ranks have either strong niches, real marketing, or both.
Why does BSR matter for niche research?
BSR is the public signal of demand. A niche where the top 10 books all sit in BSR 30,000 to 80,000 means real, sustained sales exist. A niche where the top books are in BSR 800,000+ means the demand is thin even at the top. Use BSR ranges across competing titles, not single-book BSR, to evaluate a niche.
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Related terms
Low-content book
A low-content book is a KDP-published book whose interior is mostly empty or templated, such as journals, planners, logs, and coloring books. Pages are not blank but carry minimal author-written content. KDP allows low-content books with a separate dashboard since 2018.
Evergreen niche
An evergreen niche on KDP is a coloring book niche whose demand survives at least 24 months without a trend-cycle collapse. The four structural anchors of evergreen demand are recurring life events, identity communities, replenishing demographics, and permanent human needs. Mandalas, animals, and Christmas are textbook evergreen.
Browse path
A browse path is the chain of nested categories a book sits inside on Amazon's storefront, like Books > Crafts, Hobbies & Home > Crafts & Hobbies > Coloring Books for Grown-Ups. KDP titles can be in up to 3 browse paths. The right paths drive both default sort placement and the BSR-by-category badges the book competes for.