The present study is a cross sectional study conducted at three medical colleges of state Tamil Nadu, Uttarakhand and Haryana, with a focus on identifying the determinants affecting the well-being of medical students. A pre-defined questionnaire and validated tool i.e., WHO-5 well-being index was used to assess the psychological subjective well-being of graduate and under graduate medical students. The goal of this study is to assess the well-being of graduate and under graduate medical students, and identify the determinants that affect their well-being status.