The are a few website value evaluation tools available on the Internet to evaluate how much a website worth.
Sitestimator.com is one of them. I have involved in 90% of the coding of the site including the design and the evaluation algorithm. It takes many factors/parameters from different sources and priority of the souces to calculate a website’s value and the earning potential of a website.
It’s not is not 100% accurate but it is a good indicator of a website’s earning potential and how the website could beneficial to a advertiser if the advertiser buy an ads on the site. Besides, it also help website’s own to look at-a-glance the overall performance of a website (e.g. indexed pages, inbound links and website traffic).
You can check your website’s value here too: