The Retirement Calculator by FinWise is a powerful tool designed to help users determine how much they need to save for a comfortable retirement. By inputting personal details such as current age, annual income, retirement savings, and monthly contributions, users can visualize their retirement plan and see how different variables affect their savings. The calculator provides real-time updates, allowing users to adjust their inputs and refine their retirement strategy. With insights into spending, savings rates, and potential returns, this tool empowers individuals to take control of their financial future.