Methane gas, often known as CH4, is created by landfills and is considered to be one of the greenhouse gases that contribute to climate change. The anaerobic breakdown of the organic matter that is present in trash is the process that leads to the release of methane. Methane emissions are likely to increase if the Final Disposal Site's garbage is allowed to continue to accumulate in larger mounds without being processed further. The purpose of this study is to determine the amount of methane that is already being released at the Dhaka landfill and to forecast the amount of methane that will be released from the Dhaka landfill over the following ten years. As a point of reference, the IPCC Waste Model Calculation method is used in the process of calculating methane emissions from Final Disposal Sites. According to the findings, the amount of garbage generated reached 0.449 kg per person each day, with organic waste making up the majority of the waste's composition. At the Dhaka Final Disposal Site, the potential value of methane emissions is 2.24 Gg/year, and according to the projections for 2026, this value will increase to 4.968 Gg/year. The socialization of reduce, reuse, and recycle procedures as well as the creation of the already existent Open Dumping Landfill are two examples of mitigation and adaptation measures that might be advocated to others.