by Jonatan Jumbert on WordPress.org
This plugin extracts the text of all your pages and posts from HTML code and calculates the content ratio based on this information.

WPCode Content Ratio > Purpouse and home ratio detail
The Code to Text Ratio represents the percentage of actual text in a web page. This plugin extracts the text of all your pages and posts from HTML code and calculates the content ratio based on this information.
The code to text ratio of a page is used by search engines and spiders to calculate the relevancy of a web page. A higher code to text ratio gives you a better chance of getting a good page ranking for your page.
Not all search engines are using the code to text ratio in their index algorithm, but most of them do. So having a higher code to text ratio than your competitors gives you a good start for on-site optimization.