How Many Books Is That Bestseller Really Selling? Find Out Instantly.
Turn confusing sales ranks into clear insights with the Amazon Book Sales Calculator—built to help you research smarter, validate faster, and publish with confidence.
Amazon Book Sales Calculator
Estimate daily and monthly sales from Amazon Best Sellers Rank (BSR).
See How Many Copies a Book Sells on Amazon Based on Its Best Sellers Rank (BSR).
Just enter a book’s BSR from Amazon, and the calculator will instantly estimate how many copies it sells per day and per month.
It’s a quick and easy tool that helps you understand what’s working in your niche. Whether you’re researching other books, planning your next launch, or trying to figure out how many sales it takes to rank, this tool gives you the numbers you need.
Perfect for self-published authors and anyone curious about what sells on Amazon.
Frequently Asked Questions about Amazon Book Rankings
Find answers to common questions about Amazon rankings, book sales, and how to measure your success as a self-published author.
Stuck on your book topic?
The Best Sellers Rank (BSR) is a number Amazon assigns to each book based on its recent sales performance. The lower the BSR, the higher the sales. A BSR of 1 means it’s the top-selling book in its category.
You can find the BSR on a book’s Amazon product page, usually under the “Product Details” section. Kindle and paperback editions may have different BSRs.
Amazon updates BSRs every hour based on recent sales. That means a book’s ranking can change frequently, especially if it’s in a competitive category.
Not always. A lower BSR means more sales, but income depends on factors like price, royalties, and whether the book is part of Kindle Unlimited (which pays per page read).
It depends on the category. In very competitive niches, you may need hundreds of sales per day. In smaller niches, just a handful of daily sales can get you to the top 10.
Generally, a BSR under 100,000 means you’re making regular sales. Under 10,000 is excellent. But what matters most is how well your book performs in your specific niche.
No, free books have their own separate ranking system. If your book is listed as free, it will show up in the “Top Free” charts, not the regular paid rankings.