Compound Interest Formula:
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Definition: This calculator estimates the future value of an investment based on compound interest over time.
Purpose: It helps individuals plan for retirement by projecting how their savings will grow over time.
The calculator uses the compound interest formula:
Where:
Explanation: The principal amount grows exponentially over time as interest is earned on both the initial principal and accumulated interest.
Details: Understanding compound growth helps with retirement planning, setting savings goals, and making informed investment decisions.
Tips: Enter your initial investment amount, expected annual return rate (default 5%), and time horizon (default 10 years). All values must be > 0.
Q1: How accurate are these projections?
A: Projections assume a constant rate of return, which may vary in reality. Use as an estimate, not a guarantee.
Q2: What's a realistic annual growth rate?
A: Historically, stock market returns average 7-10% annually, but conservative estimates often use 4-6% for retirement planning.
Q3: Does this account for inflation?
A: No, the results are in nominal dollars. For real value, subtract expected inflation from your growth rate.
Q4: What if I make regular contributions?
A: This calculator assumes a single lump sum. For regular contributions, use a future value of annuity calculator.
Q5: How does compounding frequency affect results?
A: This assumes annual compounding. More frequent compounding would yield slightly higher returns.