Compound Interest Calculator
See how your money grows over time with the power of compounding. Calculate final balance, total interest earned, and a year-by-year growth breakdown.
📈 Calculate Compound Interest
Enter your principal, rate, and time period to see how your investment grows.
| Year | Balance | Interest Earned | Total Contributions |
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Compound Interest Calculator — Watch Your Money Grow
Our free compound interest calculator shows you exactly how your savings or investments grow over time when interest compounds on itself. Whether you are planning for retirement, building an emergency fund, or comparing investment options, this compound interest calculator gives you the complete picture with monthly contributions included.
What Is Compound Interest and How Does This Calculator Work?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. This compound interest calculator uses the formula A = P(1 + r/n)^(nt) + contributions, where P is principal, r is annual rate, n is compounding frequency, and t is time in years. The compound interest calculator shows your final balance, total contributions, and total interest earned separately.
Compounding Frequency in the Compound Interest Calculator
The more frequently interest compounds, the more you earn. Use this compound interest calculator to compare daily, monthly, quarterly, and annual compounding on the same investment. The difference is surprisingly significant over long periods — the compound interest calculator makes this visible instantly.