Compound Interest Calculator
See how your money can grow over time with the power of compound interest. Adjust the inputs below to explore different scenarios.
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How Compound Interest Works
Compound interest is the interest you earn on both your original principal and on the accumulated interest from previous periods. It's often called "interest on interest" and is one of the most powerful forces in personal finance.
The formula is: A = P(1 + r/n)nt, where:
- P = Principal (initial investment)
- r = Annual interest rate (in decimal form)
- n = Number of times interest compounds per year
- t = Time in years
- A = Final amount
The key to maximizing compound interest is to start early, invest consistently, and let time do the work. Even small monthly contributions can grow into substantial sums over decades.
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⚠️ Disclaimer: This calculator is for educational purposes only. Results are estimates based on the inputs provided and assume a constant rate of return. Actual investment returns vary and are not guaranteed. Consult a qualified financial professional for personalized advice.