A method for calculating trust level of a user on social networking sites, comprising: consolidating information related to users operatively associated with at least a web based social platform; assigning weight to each of the consolidated information; computing aggregated score for at least an information; computing weighted average of the aggregated scores of the information; and calculating trust score based on the weighted average score. It further comprises assigning a trust level to the users based upon the trust. The method enables a user to create web of trust for social contacts or friends on the web based social platform wherein the web of trust comprises of most trusted friends, average trusted friends and least trusted friends.