Keyword density is the percentage of words within a document, content, or web site, which are keywords. It is determined by the number of times your keywords or keyword phrases appear in your content. Keyword density is very important to be done right, but it can also have a very negative influence when overdone. Having the right balance is very important. Use our free keyword density tool to calculate the keyword density in your website. Its free, and easy to use. Try it now and improve your content quality.