The ‘Bangladesh 2050 Energy Pathway’s Calculator’ (BD2050) is an innovative web-based computer model that displays the country's energy demand and supply, as well as their interaction with the country’s greenhouse gas emissions reduction target. Developed by a team of researchers from Cardiff University led by Dr Monjur Mourshed, a British-origin Bangladeshi, this online software model integrates energy generation and usage, carbon emissions, and land use in Bangladesh. It helps policymakers choose energy sources with less climate impact and allows users to balance energy sources against energy demand up to 2050. This calculator, supported by the UK’s Department for Energy and Climate Change and Bangladesh’s Ministry of Power, Energy and Mineral Resources, is the first of its kind for any least developed country. It enables the government and the public to explore energy, economy, and emission pathway options and their impacts on various sectors. The calculator is accessible to everyone, providing an opportunity for all sectors of society to engage in energy-informed discussions and influence decision-making. British High Commissioner in Dhaka, Robert Gibson, emphasized the importance of using this calculator in making informed energy investment decisions for the future, especially as Bangladesh faces challenges in developing its energy infrastructure while tackling climate change. Dr Saleemul Huq, Director of the International Centre for Climate Change and Development, highlighted the importance of Bangladesh planning a low carbon development pathway, with the assistance of tools like the Carbon Calculator.