Investment Gain/Loss Calculator: Easily Track Your Portfolio Performance

Enter any current price and your original buy price; the tool instantly shows the percentage gain or loss. For example, buying at $80 and valuing today at $104 equals a 30 % gain. Over 60 % of U.S. investors review returns monthly (Gallup, 2022). The calculator uses the simple rac{Market Price – Purchase Price}{Purchase Price} × 100 formula (SEC Investor.gov, 2023).