Compound Interest Calculator

Compound interest is interest calculated on both your original investment and the interest it earns over time. Unlike simple interest, which only applies to the initial amount, compound interest allows your money to grow faster because earnings are continually reinvested.

A compound interest calculator estimates how your investment could grow based on several key factors:

• Your initial investment
• Ongoing contributions
• Interest rate
• Compounding frequency
• Length of time invested

By combining these inputs, the calculator shows how compound interest can accelerate the growth of your investment over time.

Compounding frequency refers to how often interest is applied to your balance, such as annually, quarterly, or monthly. More frequent compounding generally results in slightly higher returns, assuming the same interest rate.

Compound interest is powerful because of time. The longer your money stays invested, the more opportunity interest has to earn interest on itself. Even small, regular contributions can grow significantly over decades thanks to compounding.

Compound interest commonly applies to:

• Savings accounts
• Certificates of deposit (CDs)
• Retirement accounts (401(k), IRA)
• Long-term investment portfolios

Any investment where earnings are reinvested can benefit from compounding.

A compound interest calculator provides estimates, not guarantees. Calculations assume a consistent rate of return, which may not reflect real-world market performance.

Actual returns can vary due to market conditions, fees, taxes, and investment choices. The calculator is best used as a planning tool to explore potential growth scenarios rather than predict future results.