Many SEO experts consider the optimum keyword density to be 1 to 3 percent. Using a keyword more than that could be considered search spam. The formula to calculate your keyword density on a web page for SEO purposes is (Nkr / Tkn) * 100, where Nkr is how many times you repeated a specific keyword and Tkn the total words in the analyzed text. This will result in a keyword density value. When calculating keyword density, be sure to ignore html tags and other embedded tags which will not actually appear in the text of the page once it is published. When calculating the density of a keyword phrase, the formula would be (Nkr * Nwp / Tkn) * 100, where Nwp is the number of words in the phrase. So, for example, for a page about search engine optimization where that phrase is used four times and there are four hundred words on the page, the keyword phrase density is (4*3/400)*100 or 3 percent.

If a particular keyword has a higher density on your web page, then the likelihood of your page obtaining a better search engine ranking increases. Note that not all search engines bother with keyword density and indeed even those that do have their own algorithm for computing the density of a keyword. However, the principles described in this article is general enough to help your page improve its ranking in the engines that take keyword density into account.