Investment Calculator

By Dan Miller | Updated March 11, 2025

When you’re investing, it’s important to understand how the rates of return on different investments compare over periods of time. By using this investment calculator, you can plug in different numbers to see the impact of various hypothetical rates of return, and compounding periods.

Although this investment calculator is hypothetical, and doesn’t take into account actual investments, by allowing you to vary certain inputs an investment calculator can help you evaluate the impact of certain financial choices.

It can also show you how switching up the amount you initially invest, and making regular contributions, might change the equation.

*Using this free calculator is for informational and illustrative purposes only.

Calculator Definitions

• Initial Investment: If you currently have a balance in your investment account, you can enter it here. If you don’t have any money in an investment account now, but plan to start, you can enter $0 for your starting amount.

• Years of Investment Growth: How many years you plan to keep the money invested. The earlier you start investing, the more years your money has to grow.

• Assumed Annual Return: The annual rate of return you expect to get on your investments, without factoring in inflation, taxes, or fees.

• Annual Contributions: The amount of any contributions you are going to make on a yearly basis. If you want to calculate returns based solely on the starting amount, set this value at $0.

• Your Estimated Investment Balance Is: This is the final value of your investment, based on the numbers you plugged in. You can experiment with different amounts and timeframes to explore a potential investment scenario that best fits your situation.