Compound Interest Calculator

Determine how much your money can grow using the power of compound interest. 



Step 1: Initial Investment

Amount of money that you have available to invest initially.

Step 2: Contribute

Amount that you plan to add to the principal every month, or a negative number for the amount that you plan to withdraw every month.
Length of time, in years, that you plan to save.

Step 3: Interest Rate

Your estimated annual interest rate.
Range of interest rates (above and below the rate set above) that you desire to see results for.

Step 4: Compound It

Times per year that interest will be compounded.

Next Steps

Take our quiz on compound interest

Quest Mark icon

Test your knowledge of compound interest, the Rule of 72, and related investing concepts in our most popular investing quiz!  There’s a trick question – can you spot it?  

Check out the background of investment professionals

Magnifying glass icon

It’s a great first step toward protecting your money and it only takes a few seconds. Learn more about an investment professional’s background registration status, and more.