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? Even better, you can see how many books you have to sell in order to reach a specific rank.

All you have to do is find the Amazon Sales Rank for any eBook or print book on Amazon and type that number into the simple Amazon Book Sales Calculator developed by Skye Chilton.

BSR Calculator | From the blog of Nicholas C. Rossis, author of science fiction, the Pearseus epic fantasy series and children's books

You can use this handy tool to give you an accurate estimation of how many copies are being sold on Amazon for any eBook or print book, but also to find out how many sales you need in one day or one month to hit a certain bestseller ranking.

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.

You can find out more on the Amazon Book Sales Calculator on TCK Publishing. And if you’re looking for a more conventional kind of calculator, I typically use calculator online.