Assessment of carbon stock in urban forest is essential to obtain the carbon sequestration rate and has important role in urban environment with play vital role to conserve biodiversity. This study was conducted in Gokarna protected forest, Kathmandu, to explore the forest carbon stock. A total of 60 circular plots of random sample with size of 250 m2 were sampled for study. The biomass of standing trees was estimated by using allometric equation of trees, measuring their diameter & height