Amazon book sales calculator Rank to sales per day
Paste any book's Amazon Best Sellers Rank (BSR) and see roughly how many copies it sells a day.
Copy the Best Sellers Rank line from any book's Amazon page and paste it in, or just type the number.
Where do I find the rank?
- Open the book on Amazon.com.
- Scroll down to Product details.
- Copy the Best Sellers Rank line and paste it above. It's the main rank ("in Kindle Store" or "in Books"), not the category ones.
Close the gap
Put in your own book's rank to see how far you are from this one, and roughly what ads would cost to get there.
Estimates, not Amazon data. Amazon doesn't publish sales, so this uses the middle of four published rank-to-sales studies (sources below), with a range where they disagree. Rank moves hourly, and Kindle+ (formerly Kindle Unlimited) borrows count toward it.
A Kindle Best Sellers Rank of 1,000 is about 70 to 180 sales a day. 10,000 is about 13 to 25. 50,000 is about 3 to 8. 100,000 is about 1 or 2. Paperbacks sell fewer copies at the same rank, because they're ranked on a separate list. Anything under 50,000 is selling steadily, and that's the line I use when I pick comps.
What a Best Sellers Rank means in sales
Here's the curve the calculator uses, as a table. The ranges are where the published estimates land.
| Rank | Kindle ebook | Paperback |
|---|---|---|
| #1 | 3,000 to 7,000 a day | 1,500 to 4,000 a day |
| #10 | 2,000 to 4,000 a day | 700 to 1,300 a day |
| #100 | 300 to 1,000 a day | 200 to 400 a day |
| #1,000 | 70 to 180 a day | 50 to 90 a day |
| #5,000 | 25 to 40 a day | 15 to 30 a day |
| #10,000 | 13 to 25 a day | 6 to 12 a day |
| #50,000 | 3 to 8 a day | 1 to 2 a day |
| #100,000 | 1 to 2 a day | 1 every day or two |
| #300,000 | 1 every 3 to 7 days | 1 every 4 to 12 days |
| #1,000,000 | A sale or two a month | About one a month or less |
How accurate is this?
Amazon doesn't publish sales numbers, so every calculator is an estimate. The honest ones tell you where their numbers come from. Mine blends four published sources:
- ManuscriptReport, measured on the live Kindle store in August 2026. The newest data I could find.
- T.R. Ragan's sales ranking chart, built from her own books' real sales.
- Rob Eagar, who matched real purchases to rank changes, and the only source here with separate print numbers.
- Kindlepreneur's calculator is built on Publisher Rocket's private data. Their formula isn't published, so I used it as a sanity check, not a source.
They agree closely at the top and bottom of the list. They disagree most between 10,000 and 100,000, which is exactly where most indie books sit. That's why the calculator gives you a likely range, not one exact number.
How I use this with comps
When I start with a new client, the first thing I build is a list of 15 to 30 comparable books. I want at least half of them under 50,000. That tells me readers are buying this kind of book right now, not five years ago.
Paste each comp into the calculator and you'll see what "selling" actually looks like in your genre. Then put in your own rank under "Close the gap." It'll show you roughly how many more readers a month you'd need, and what that costs at a healthy $2 to $10 per new reader. The full process is in how to market a self-published book.
Why your rank jumps around
Rank updates through the day, and recent sales count more than older ones. When a book sells rarely, one sale can jump it hundreds of thousands of places, then it slides back over the next few days. So don't read too much into a single check. Look at where a book sits across a week.
Kindle+ borrows count toward rank too. For a book in Kindle+, some of the "sales" a calculator estimates are really borrows.
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Frequently asked questions
What is BSR on Amazon?
BSR stands for Best Sellers Rank. It's the number Amazon shows under Product details on every book's page. It ranks that book against every other book in the same store, the Kindle Store for ebooks and Books for print, by how many copies it has sold recently. #1 is the best-selling book on Amazon right now, so the lower the number, the more copies a book is selling. Amazon updates it about every hour.
How accurate is an Amazon book sales calculator?
It's an estimate. Amazon doesn't publish sales numbers, so every calculator uses a curve built from books whose real sales are known. Published estimates disagree, especially between ranks 10,000 and 100,000, which is why this one shows a likely range instead of one exact number.
What is a good Best Sellers Rank for a new book?
Under 100,000 means a book is selling about a copy a day or more. Under 50,000 is steady sales, a few a day. When I pick comps for a client, I want at least half of them under 50,000.
Do Kindle+ (Kindle Unlimited) borrows count toward Best Sellers Rank?
Yes. Borrows count toward a Kindle book's rank, so for books in Kindle+, the "sales" a calculator estimates include borrows.
Is a paperback rank the same as a Kindle rank?
No. Kindle books are ranked in the Kindle Store and paperbacks in Books, which are separate lists. The same rank means fewer sales for a paperback than for a Kindle book, so pick the right format before you calculate.
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closing
the gap?
Send me your book and two or three comps you'd like to catch. I'll tell you what I'd fix first, and whether coaching or done-for-you fits you better.
I typically respond within one business day.
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