Calculate how your investments grow over time.
Enter details to see the calculation.
Compound interest is calculated on both the principal and accumulated interest. It's why investments grow faster over time—the "interest on interest" effect.
the principal amount in Principal.
the interest rate in Rate.
the time period and compounding frequency.
the final amount and interest earned.
— yearly, quarterly, or monthly affects results.
— time is your biggest advantage.
— divide 72 by rate to find doubling years.
— compare with fixed deposit returns.
Compound interest is often called the "eighth wonder of the world," and for good reason. It is the interest you earn on both your initial principal and the accumulated interest from previous periods. In other words, it's "interest on interest," and it can make a deposit or loan grow at a much faster rate than simple interest.
The magic of compounding lies in its exponential growth. When you invest money, you earn interest. With compound interest, that interest is added back to your principal amount. The next time interest is calculated, it's based on this new, larger total. This cycle repeats, accelerating your investment's growth over time. The more frequently interest is compounded (e.g., monthly vs. annually), the faster your investment grows.
The formula used by our calculator is:
A = P(1 + r/n)^(nt)
Our calculator handles all these variables for you, providing an instant and accurate projection of your investment's future value.
To truly harness the power of compounding, follow these best practices:
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