Aim: Our goal with this study was to see the well-being index among adolescents in Kathmandu, Nepal. But also to investigate the factors that contribute to well-being and what the adolescents believe is the most important thing.  Method: The method used in this study was a questionnaire, it included eight questions with 44 adolescents participating. Group interviews were used by help with mindmap, groups of  3-4 adolescents to investigate their perspective of well-being used. We chose to do both because we wanted the results of the index and the adolescents thoughts about well-being to emerge.  Results: The results from the questionnaire showed that 34,1 percent among the adolescents have 80-90% well-being according to the PWI scale we applied. According to the adolescents’ own estimated level of well-being, about 68 percent of them have good well-being and 30 percent of them have a really good well-being. However the PWI scale shows that only 9 percent have a really good well-being. The results of the group interviews showed the most important thing for well-being according to the adolescents are satisfaction, quality of life, happiness, love (friends, family, relationship), education, health and social service.