I am Freelance Web developer. i dont know How to Set Web Design and Web Development Prices?

Recently i have done one web designing project.that project contains 16 pages with mysql.
Please Tell me how much should i have to charge?

Pricing a job is highly dependent on a few major factors like the complexity of the project, the skill/experience of the development organization, and current market rates. I can't give you an exact number but this article is a good read on the subject.