Compound Interest Calculator

Want to know the accumulated value of your savings or investment over a period of time? The compound interest calculator lets you see the power of compounding, whether you are making a one-time deposit or monthly contributions. This rewards calculator gives you the future value of the investment. It will consider your initial deposit, recurring contributions, years in effect, compounding frequency, and interest rate. You can use this to see the total picture of what the money will do for you in a high-yield savings account (HYSA) or money market fund.

Initial deposit
$
Monthly contribution
$
Number of years
Compounding frequency
Interest rate
%

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Compound Interest Calculator FAQ

What is a compound interest calculator?

A compound interest calculator is a tool that helps you figure out how much your money will grow over time with compound interest. It considers the principal amount, the interest rate, the time period, and how often the interest is added to your account. By using this calculator, you can easily determine how much money you’ll have in the future without needing a degree in finance.

How does compound interest work?

Compound interest for investing is the interest on a deposit calculated based on both the initial principal and the accumulated interest from previous periods. It means you earn interest on your interest. This is different from simple interest, where you only earn interest on the original amount. The longer you let your money grow, the more you benefit from the power of compound interest.

What do I need to input in a compound interest calculator?

You need to input the following: the initial principal amount (the starting value of your investment), the interest rate (as a percentage), the number of years you plan to invest, and the compounding frequency (how often you get interest payments – like monthly, annually, etc.). Our calculator also lets you input recurring contributions. 

Why is compound interest so powerful?

The power of compound interest lies in its ability to help your money grow exponentially over time. When you let your investment sit and earn interest, that interest gets added to your principal amount, which means you’ll start earning interest on a larger amount. This leads to a snowball effect where your savings growth can really take off, especially over the long term.

How can I use a compound interest calculator to plan for retirement?

A compound interest calculator for retirement planning is super easy. Just input your current savings amount (your principal), your expected annual interest rate, and the number of years until retirement. You can also include how much you plan to contribute regularly. This will help you visualize how much you’ll have saved by the time you reach retirement.