Software metrics have been proposed to measure various attributes of the software like –complexity, cohesion,software quality and productivity. Among these “complexity” is considered to be most important attribute. It can be either based on the code of the software or its dependency on other projects. The aim of this paper is to perform comparative analysis of some of the complexity metrics. The paper provides a brief introduction to McCabe complexity metrics,Halstead’s complexity metrics,object oriented metrics and Henry-Kafura Information flow metrics along with a comparison between them.