Use this simple tool to compute the return on investment ( ROI ) and annualized ROI for any investment. Enter the amount invested, the date, the amount returned, and the period length to get the results. ROI Calculator The free ROI calculator allows you to determine the profit or loss returns on your investment instantly. The Pocketful Return on Investment ( ROI) calculator helps you to find out how much you have gained on an investment . It also gives you the percentages of ROI , simple annual ROI and Compound Annual Growth Rate (CAGR). Accurately compute the Return on Investment ( ROI ) for any investment . Explore advanced ROI formulas, annualized returns, risk-adjusted metrics, and compare performance across different asset classes.