To check the profile of dengue fever applying WHO grading system. To know the outcome of patients according to the grading system. Background- Dengue virus causes spectrum of clinical manifestations which can be graded according to WHO grading system. Our study included 131 laboratory confirmed cases of dengue infection. WHO criteria were applied to them and patients were classified into Dengue Fever , Dengue Hemorrhagic fever and Dengue shock syndrome. Patients were followed up throughout their course of hospital stay till discharge/death .Patients were classified on basis of interventions done-like fluid replacement, blood transfusion. Classical Dengue fever (classical DF), Dengue Haemorrhagic fever ( DHF), Dengue Shock syndrome (DSS), Platelet count. Out of 131 patients 60% were found to have Dengue fever,36% with Dengue hemmorhagic fever and 4.5% with Dengue shock syndrome. Majority of patients with Dengue hemmorhagic fever and Dengue shock syndrome required interventions and had longer duration of hospital stay. WHO criteria for grading of dengue helps us to assess the severity and also segregate the patients who need aggressive management.