Compound Interest Calculator

See exactly how your money grows. Enter a starting balance, a monthly contribution, an expected annual return, and a time period — the calculator shows your future value, how much of it is your own contributions, and how much is growth. The math is standard compound-interest; every figure is shown so you can check it.

Starting balance ($)

Monthly contribution ($)

Annual return (%)

Years

Results

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Growth by year

Year	Balance	Your contributions	Growth

Education, not advice: This tool is for education only and is not personalized financial advice. It assumes a constant rate of return, which does not happen in real markets. Investing involves risk, including loss of principal. Past performance does not guarantee future results.