Niche HoundAmazon Book Sales Rank Calculator
Enter a book’s Best Sellers Rank to estimate how many copies it sells a month. Works for Kindle, paperback and hardcover. Free, with no sign-up.
Fill in any or all. Use the overall rank from the book’s Product details (for example “#25,000 in Kindle Store”), not a category rank.
Estimated copies per month, shown as a range. Everything is worked out in your browser; nothing you type is sent anywhere.
Skip the typing. Niche Hound is a Chrome extension that shows these estimates under every book on Amazon search pages, for every edition, automatically.
Coming soon to the Chrome Web StoreSales rank to sales: quick reference
Estimated copies sold per month at common ranks. Kindle books are ranked in the Kindle Store; paperbacks and hardcovers are ranked in Books.
| Best Sellers Rank | Kindle | Paperback | Hardcover |
|---|---|---|---|
| #100 | 21,100–46,800 | 6,300–14,000 | 3,200–14,000 |
| #1,000 | 3,200–5,000 | 950–1,500 | 480–1,500 |
| #5,000 | 700–1,200 | 210–370 | 110–370 |
| #10,000 | 360–720 | 110–220 | 55–220 |
| #25,000 | 150–350 | 45–110 | 20–110 |
| #50,000 | 75–160 | 25–50 | 10–50 |
| #100,000 | 40–70 | 10–20 | 6–20 |
| #250,000 | 15–25 | 5–8 | 2–8 |
| #500,000 | 8–10 | 2–4 | 1–4 |
| #1,000,000 | 4–7 | 1–2 | 1–2 |
How the estimate works
No one outside Amazon knows exact sales, so the calculator doesn’t pretend to. It runs your rank through two public rank-to-sales formulas: BookBloom’s banded model (recalibrated November 2025, smoothed where its bands meet) and a widely used rank calculator curve, where a Kindle rank of #10,000 is about 15 sales a day. The range covers both, widened a little because rank moves hour to hour.
Print books sell fewer copies than Kindle books at the same rank, so paperback estimates use about 30% of the Kindle figure and hardcovers 15–30%. When you enter more than one edition, the calculator adds them up.
Tips for reading sales rank
- Rank is a snapshot. A single sale can push a slow-selling book up hundreds of thousands of places for a few hours. Check the rank on a few different days before you trust it.
- Use the overall rank. The smaller category ranks (like “#3 in Cozy Mysteries”) aren’t comparable across categories.
- Compare, don’t count. Estimates are most useful for comparing books and niches with each other, not for predicting exact income.
- Very top ranks swing the most. Treat estimates for ranks under #100 as especially rough.
Sales figures are estimates, not Amazon data. Niche Hound is not affiliated with, endorsed by or sponsored by Amazon. Amazon and Kindle are trademarks of Amazon.com, Inc. or its affiliates.