Calculating Amazon Sales Header Image

Did you know you can estimate how many sales any eBook or print book on Amazon is currently selling just by looking at its listing on Amazon?

All you have to do is find the Amazon Sales Rank for any eBook or print book on Amazon and type that number in to our simple Amazon Book Sales Calculator below.

BSR to Sales Calculator

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Note: Make sure not to include any commas or spaces when you type in the BSR (Amazon Best Seller Rank) in order to calculate how many sales are needed.

How to Use Our Amazon Book Sales Calculator

Let me show you a quick example of how to find the Amazon Bestseller Ranking for any book on Amazon so you can use the sales calculator.

Here’s the Amazon listing for the Kindle version of Unlimited Memory by TCK Publishing client Kevin Horsley.

Unlimited Memory Amazon Screenshot Image

It looks just like every other book listing on Amazon.

All you have to do to find out how many Kindle eBook or Print copies it’s selling currently is scroll down the book’s page on Amazon to the “Product Details” section.

Underneath Product Details, look for the section that says “Amazon Best Sellers Rank.” In the screenshot above, you can see it says “#139 Paid in Kindle Store.”

Now, there are a few things you should know about this Amazon Best Sellers Rank.

First, notice it says “Paid.” If it said “#139 Free in Kindle Store,” that would mean the Kindle version of the book was currently free (like during a KDP Select 5-Day Free Promotion Campaign).

It also says “in Kindle Store.” If you’re looking at a print edition of a book on Amazon, it will say “in Books.”

Now that you have the Amazon Bestseller Rank for the book, all you have to do is type it into the Amazon Kindle Sales Calculator above.

If you want to find out how many print copies the book is selling, just click the Paperback or Hardcover edition of the book on Amazon, scroll down to Product Details on that page, and find the Amazon Best Sellers Rank for the print edition. Then just copy and paste that number into the Amazon Book Sales Calculator above, make sure to select “Book” instead of “eBook” for the book type, and click “Calculate Sales.”

How Our Amazon Book Sales Calculator Works

You can use this handy Book Sales Calculator to give you an extremely accurate estimation of how many copies are being sold on Amazon for any eBook or print book (we’re working on audiobook sales estimations as we speak).

Unlike most other Kindle Sales Calculators out there, this one is incredibly accurate with only a 6% error rate. That means if it shows an estimate of 1,000 sales, the actual sales will fall somewhere between 940 and 1,060 sales. By contrast, many other Kindle sales calculators we’ve tested have a 50-100% error rate.

Notice the Amazon Book Sales Calculator tells you how many sales you need to hit in EITHER one day OR one month to hit a certain bestseller ranking. We use “The Rule of 15” which means if you take the monthly sales needed to hit a certain bestseller ranking, all you have to do is divide that monthly sales number by 15 to calculate how many sales you need in one day (24 hours) to achieve that same sales ranking.

The Rule of 15 works because Amazon’s algorithm for sales rankings more heavily weights recent sales. That means 10 sales in the last hour will boost your sales ranking faster than getting 10 sales in the last week.

For example, in order to hit #1,000 Kindle Best Sellers Ranking, your book either needs to sell 2,778 copies over a 30-day time period OR sell just 185 copies in a single 24-hour period (even if it is a brand new book with no previous sales).

Book Calculator Infographic

How to Use Amazon Sales Rank Data

There are a lot of ways you can use this sales rank data to help if you’re an author or publisher. First, you can check out the competition and see how many books they’re selling.

Once you’ve done that, you can see how many copies you need to sell either in a one day or one month time period in order to outrank the competition. If you’re planning a book launch or promotion, this data can help you predict how high your book will rank on Amazon and if you can hit #1 in your bestseller categories on Amazon.

You can also use this data for market research to get a good idea how big a niche or market is before you invest the time writing, publishing and marketing a book in that market. For example, if you notice all your competitors in a market aren’t selling more than 100 eBook copies per month on Amazon Kindle, you can be pretty sure your book won’t be selling more than 100 eBook copies per month on Kindle unless your book is a lot better than the competition, is more appealing to the market, and you have a better marketing strategy than the competition.

A Note on Kindle Sales Ranking Adjustments KDP Select Ebooks

If your eBook is enrolled in KDP Select and selling well on Amazon (Above 50,000 Best Seller Ranking or so), you may think the sales calculator is overestimating your monthly sales, but something else is going on!

When Amazon customers borrow your eBook through Kindle Unlimited (KU) or the Kindle Owner’s Lending Library (KOLL), Amazon counts the number of pages those customers read from your book and counts them as sales in order to calculate your Kindle Best Seller Ranking.

Based on our data from a few hundred books enrolled in KDP Select, Amazon will count 1 sale in order to calculate your Kindle Best Seller Ranking every time the KENP (Kindle Edition Normalized Pages) Read reaches about 65% of the total estimated page count of your Kindle eBook.

In other words, if your Kindle eBook is 100 pages long, every 65 KENP (Kindle Edition Normalized Pages) Read in your KDP Reports will count as 1 sale in order for Amazon to calculate your Kindle Best Seller Ranking.

For publishers who use KDP Select, having a lot of readers borrow your book through KOLL or KU can dramatically increase your sales rankings on Amazon (assuming they actually read it!).

How to Tell if Your Publisher is Reporting Book Sales Accurately

When we originally created this Amazon book sales calculator, we did so with the self-published author in mind. However, I have since heard from several authors whose books were published by a traditional or independent publisher who are now using the calculator as a guideline to make sure the royalty reports from their publishers are accurate.

Please realize that we cannot guarantee the Amazon book sales calculator as a tool to help you prevent publishers from providing inaccurate royalty statements. In many cases, your publisher will have distribution for your eBook and print books beyond Amazon, and our calculator will not help you at all when it comes to book sales outside of

Also note that Amazon has several stores where readers can purchase Kindle eBooks and physical books including,,,,,,,,,, and Our calculator will currently only help you calculate sales on, and will not help you account for sales in these other markets.

Want Even More Awesome Tools and Resources for Authors?

Check out our Ultimate List of Author Resources here.

Check out Bestseller Ranking Pro for more advanced tools, training, and tips on getting your book to #1 bestseller on Amazon, advanced market research for authors and more.

If you love our free Amazon Book Sales Calculator, you’ll love our free resources to help you sell more books and increase your Amazon Best Seller Rankings: