What's My
Compound Interest?
See how your investments can grow over time with the power of compound interest.
Investment Details
Investment Summary
Enter your investment details and click calculate to see your potential returns.
Understanding Compound Interest
Compound interest is often called the "eighth wonder of the world" because of its powerful ability to grow wealth over time.
How Compound Interest Works
Compound interest is the process where the interest you earn on an investment is added to the principal, so that the interest itself earns interest. This creates a snowball effect that accelerates your wealth growth over time.
The Power of Time
The longer your money is invested, the more powerful compound interest becomes. Starting early, even with smaller amounts, can lead to significantly larger returns.
Regular Contributions
Adding regular contributions to your investment accelerates growth. Even small monthly deposits can make a substantial difference over time.
Compounding Frequency
Monthly compounding is most common for savings accounts and investments. Some accounts offer daily compounding for slightly better returns, while annual compounding is typical for bonds and some fixed-rate products.
The Rule of 72
A quick way to estimate how long it will take for your money to double is to divide 72 by your annual interest rate. For example, at 7% interest, your money will double in approximately 72 ÷ 7 = 10.3 years.
Important: This calculator provides estimates based on constant interest rates and regular contributions. Actual investment returns may vary due to market fluctuations, fees, taxes, and other factors.