BSR → Sales Estimator
Enter a Kindle Best Sellers Rank (the “Amazon Best Sellers Rank” on any product page) to estimate daily and monthly sales. Based on publicly observed rank-to-sales curves; treat as a ballpark, not gospel.
Kindle ebook store only; print BSR follows a different curve. Borrows (KU) also move BSR, so KU-heavy books sell fewer copies than this estimate at the same rank.
How to estimate sales from an Amazon Best Sellers Rank
Frequently Asked Questions
Under 10,000 overall means roughly 20+ sales/day — a solidly selling book. Under 1,000 is a strong seller (~115+/day), and under 100 is chart-level success. Most of the catalog sits above 100,000, selling around one copy a day or less.
Roughly one sale per day, give or take. The curve is steep: BSR 10,000 is ~20/day, BSR 1,000 is ~115/day, BSR 100 is ~500/day.
Yes — full borrows count similarly to sales for ranking purposes. A KU-heavy book at a given BSR sells fewer actual copies than this estimate suggests.
Roughly hourly, weighted toward recent sales with a decaying contribution from older ones — which is why a single promo spike can move BSR dramatically for a day or two.
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