Compound Interest Calculator

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Often called 'interest on interest', it causes wealth to grow exponentially over time. The formula is A = P(1 + r/n)^(nt), where P is principal, r is annual rate, n is compounding frequency per year, and t is time in years.

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How to Use

Enter your initial investment (principal), annual interest rate, how often interest compounds (daily, monthly, annually, etc.), and the investment duration. Optionally add monthly contributions to see how regular deposits boost growth. The calculator shows your final balance, total interest earned, and a year-by-year breakdown table.

Common Use Cases

• •Planning retirement savings and estimating future portfolio value
• •Comparing different savings account or investment options
• •Understanding how compounding frequency affects growth
• •Calculating the impact of regular monthly contributions
• •Teaching financial literacy and the power of long-term investing

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