Calculate the Future Value of your Initial and Periodic Investments with Compound Interest. Tweet. Send to a friend ˅ Go directly to the calculator ˅ Saving money requires a big effort, it forces you to budget and be disciplined with your spending habits, and many times it can seem hard to stay motivated. It is an important action which will allow you to retire in the future without concern. The future value calculator demonstrates power of the compound interest rate, or rate of return. For example, a $10,000.00 investment into an account with a 5% annual rate of return would grow to $70,399.89 in 40 years. The 10% rate of return would increase your initial $10,000.00 to $452,592.56 in the same 40 years. Below is a stock return calculator which automatically factors and calculates dividend reinvestment (DRIP). Additionally, you can simulate daily, weekly, monthly, or annual periodic investments into any stock and see your total estimated portfolio value on every date.