The 'Bangladesh 2050 Energy Pathway’s Calculator' (BD2050) is a groundbreaking online computer model that illustrates the country's energy demand, supply, and their relationship with the country’s greenhouse gas emissions reduction target. Developed by a team of researchers led by British-origin Bangladeshi Dr. Monjur Mourshed from Cardiff University, this software model integrates energy generation and usage, carbon emissions, and land use in Bangladesh. The calculator, supported by the UK’s Department for Energy and Climate Change and Bangladesh’s Ministry of Power, Energy and Mineral Resources, allows policymakers and the public to explore different energy source options and their impacts on land use, electricity, energy security, and food. This tool is being used in several countries including the UK, Japan, China, and India, and is the first of its kind for a least developed country. By providing access to all sectors of society, the calculator enables informed discussions and decision-making regarding energy investments for the future. Dr. Saleemul Huq emphasized the importance of developing a low Carbon development pathway in Bangladesh, and highlighted the calculator as a valuable tool in planning for a sustainable future.