With self-publishing anyone can now send their magnum opuses out to the hands of millions of readers worldwide. Amazon and Barnes & Noble allow you to upload your digital book up to their site. Aggregators such as Smashwords distribute your eBook to Apple, Sony, Kobo, etc. Also, don't think that print books are completely dead. Createspace (Amazon's Print On Demand company) allows you to upload your manuscript and sell print editions of your book.
If you want to sell your product direct, there's Gumroad, a site that lets you sell any digital good which you can post back to your site or blog.
Keep in mind, however, that each company takes different distribution percentages. Also, you get different royalties depending on how you price your eBook. It can all get very confusing.
But fear no more! I have just made your life easier.
I created two excel spreadsheets, one for eBook Royalties, using all the mentioned distributors royalties, charges, etc. and another one for print books, using Createspace's Royalties.
All you have to do is download the sheet, by clicking on the link below, set your book prices in their respective boxes and that's it. For the print book spreadsheet you have to add the price and page count of your book. (Don't worry it's very simple)
NOTE: In this sheet, I only used the options most people tend to go with and seem to me like the right option. I didn't include a distribution charge for iBooks or Kobo because most self-pub authors use Smashwords to distribute to them, as well as to the Sony store and Diesel. In addition, Kobo, the Sony Store, and other stores, require an aggregator like Smashwords for you to publish your book to them.
To distribute to the iBookstore, on your own, you need a Mac and an ISBN number. Most people own a PC and don't have access to a Mac. Also, ISBN numbers are pricey and Smashwords will give you one for free or you can buy one from them for ten dollars (as long as you distribute with them).
I also didn't include Bookbaby because they charge around $100 (plus an annual fee after your first year) to do the same thing Smashwords does, albeit, they give you 100% of your royalties, which needs no calculation.
As for Google Books, I have heard from plenty of people the pain it is to get your book on there and not to mention that almost no one uses it. So I found it pointless to include them on the list.
If you would like for me to include these or any other distributors/aggregators, email me at adonismarrero at gmail.com and I'll include them.
Whatever makes it easier and convenient for everyone.