About CompoundCalc

CompoundCalc is a free online compound interest calculator built for anyone who wants to make smarter financial decisions. Whether you're planning for retirement, saving for a home, or teaching kids about money, our tool is designed to be fast, accurate, and easy to use.

Our mission

Financial literacy shouldn't require a finance degree. We believe everyone deserves clear, easy-to-understand tools to plan their financial future — and they should be free.

Why trust our calculations?

Our calculator uses standard financial formulas — the future value of an initial principal plus the future value of an annuity for monthly contributions. We simulate growth month-by-month for maximum accuracy, accounting for both monthly and annual compounding frequencies.

No data collection

We never store the numbers you enter. All calculations run instantly in your browser. See our Privacy Policy for details.