Hi webgeniusbangalore, welcome to the forum
I understand that not everyone is good at knowing how to search, so I did it for you.
Luckily this question has come up literally countless times here already so with a bit of reading you’ll soon have your answer 
Keyword Density is the percentage of times keyword appear on your web page compared to the total numbers of words on your web page.
Keyword Density = (Total No. of Repeated Keywords / Total No. of Keywords on Web page) x 100
In search engine optimization (SEO) keyword density is the measurement in percentage of the number of times a particular keyword or phrase appears compared to the total number of words in a page.
http://www.webopedia.com/TERM/K/keyword_density.html
Post edited by TechnoBear to format and attribute quoted content
While the posts above have answered your question, I thought I might add an important point about keyword density as advised by Matt Cutts. There doesn’t seem to be a hard and fast calculation that Google looks at to determine this, rather, he stresses the importance of natural use of keywords as being the thing to focus on rather than the number of times you use a keyword. It should read naturally and be well integrated you can hear his commentary here:
Pretty much. Except it’s not going to count keywords just randomly entered. It has to be something that makes sense.
Keyword Density is percentage of key words repeated in a article or web page. You have many tools to calculate and give your exact figure. If you want to do manually go with this :
Total Keywords / Total Words * 100 = Answer
Example: Total Words =300 Keyword = 10
Calculate: 10/300*100= 3.333%
Thank you everyone - I don’t think we need any more definitions of keyword density.
Please only post if you have something relevant to add which has not already been said.
If you need a specific tool, use Kesor. Just copy paste your content and you will get the results instantaneously. I used it when i was blogging (cant give you the link, I am new to this blog).
This topic was automatically closed 91 days after the last reply. New replies are no longer allowed.