Calculate investment growth, compound interest, and future value of your investments
An investment calculator is a powerful tool for understanding how your money grows over time through compound interest. Whether you're investing in stocks, bonds, mutual funds, or savings accounts, our calculator shows you the potential future value of your investment based on your initial principal, expected annual return rate, and investment time horizon.
Compound interest is often called the "eighth wonder of the world" because of its powerful effect on wealth accumulation. Our calculator demonstrates this principle, helping you make informed investment decisions and understand the long-term impact of your financial choices.
The Formula:
Where A = Final Amount, P = Principal, r = Annual Rate (as decimal), t = Time in Years
📊 Example:
$10,000 invested at 7% annual return for 10 years:
A = $10,000 × (1.07)^10
A = $10,000 × 1.9672
A ≈ $19,672
Principal:
The initial amount of money you invest. This is the base on which returns are calculated.
Annual Return Rate:
The percentage gain on your investment each year. This varies by investment type and market conditions.
Compound Interest:
Interest earned on both your principal and previously earned interest, creating exponential growth over time.
Time Horizon:
The longer you invest, the more time compound interest has to work. Even small returns compound significantly over decades.
These are historical averages. Actual returns vary and past performance doesn't guarantee future results.
What's a realistic annual return rate?
It depends on your investment type. Stock markets average ~10%, bonds 4-6%, and savings accounts 0.5-1%. Diversification is key.
How often is interest compounded?
This calculator assumes annual compounding. Some investments compound monthly or daily for even better returns.
What about inflation?
This calculator shows nominal returns. Remember that inflation reduces purchasing power, so real returns are lower.