Compound interest is the process of earning interest on both the initial principal and the accumulated interest from previous periods, often described as interest on interest. This powerful financial concept is the foundation of long-term wealth building through savings accounts, fixed deposits, mutual funds, and retirement accounts. The more frequently interest is compounded — whether daily, monthly, quarterly, or annually — the faster your money grows over time.

Our free compound interest calculator helps you project the future value of your investments or savings by entering the principal amount, annual interest rate, compounding frequency, and investment duration. The tool instantly shows you the total amount, total interest earned, and a year-by-year growth breakdown. Whether you are planning for retirement, comparing bank deposit offers, or evaluating loan costs, this calculator makes complex compounding math simple and accessible.