Keyword density is the number of times your keyword phrase appears on a Web page relative to the total number of words on the page. While it's possible to manually count all the words and then count the keyword phrase, there are many tools that you can use that are easier and give you better results.
This is the tool I use to evaluate keyword density. It is a plugin for Firefox and Internet Explorer. It provides a lot more information than just keyword density, and it's quick and since it's a browser plugin it's always right there. It shows you 1-, 2-, 3-, and 4-word phrases and their densities.
This is a powerful tool which provides you a lot more information than just keyword density. One of the things I like best about this tool is that it tells you just where the keywords are and are not found. This makes it a lot easier to make changes to improve your ranking. This tool has a 30K page size limit unless you subscribe to the service.
This analyzer provides information on where they keyword phrase is found, and if you have a multi-word phrase it will also break that phrase down and tell you the specific density of each word in it.
There are words that are ignored by most search engines, and this tool will use a default list of them if you choose. Plus, you can define how long a word has to be and how many times it should appear before it's reported on.
This analyzer allows you to put in your own list of stop words or use their default list. It provides a list of 1-, 2-, and 3-word phrases and their densities.
This tool lets you specify the length of your keyword phrase, so you don't have to wade through longer or shorter phrases. But it only analyzes up to 3-word phrases, so if your keyword phrase is longer than that you'll have to find a different tool.
This analyzer has you put in the phrase you're targeting and it tells you how dense it is on the page. You can also compare it to another page, perhaps to one that ranks higher for that phrase than your page does.
This is a basic keyword analyzer that shows you 1-, 2-, and 3-word phrases. It doesn't list stop words, but I couldn't find the precise list.
This density analyzer provides a "weighted" density. What this means is that the density will be higher than in other analyzers. But it does provide you with exact locations of the keyword phrase.
