Our compound interest calculator shows the future value of your savings or investments over time, accounting for your initial deposit, monthly contributions, annual interest rate, and compounding frequency. The interactive chart makes it easy to visualize how your balance grows year by year, and the breakdown table shows exactly how much comes from your own contributions versus interest earned. Whether you're saving for retirement, a house, or college, this calculator helps you understand the enormous long-term impact of starting early and contributing consistently.