Investment Calculator
Calculate investment returns, compound interest, and future value. Plan your investments with our free ROI and growth calculator.
Investment Details
$
$
%
years
Investment Results
Future Value
$107,143.85
Total Contributions
$70,000.00
Total Interest Earned
$37,143.85
Breakdown
Initial Amount$10,000.00
Additional Contributions$60,000.00
Interest Earned$37,143.85
Growth Over Time
Year 1Year 10
Year-by-Year Breakdown
Investment Tips
The power of compound interest grows exponentially over time. Start early and stay consistent with contributions.
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Last updated: January 2026
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Frequently Asked Questions
How do I calculate my investment's future value?
Use the compound interest formula: FV = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) - 1) / (r/n)]. P is your initial investment, r is annual return rate, n is compounding frequency, t is years, and PMT is regular contributions. Example: $10,000 initial + $500/month at 7% for 20 years = approximately $338,000. The key factors are: starting amount, regular contributions, return rate, and time—with time being the most powerful due to compounding.
What is a realistic expected annual return for investments?
Historical average returns vary by asset class: S&P 500 stocks average 10-11% annually (7% inflation-adjusted), bonds average 5-6%, and savings accounts 1-2%. However, past performance doesn't guarantee future results. For conservative planning, use 6-7% for a stock-heavy portfolio and 4-5% for a balanced portfolio. Remember: higher potential returns come with higher volatility and risk of short-term losses.
How does compounding frequency affect my investment growth?
More frequent compounding means slightly higher returns, but the difference is smaller than most people think. For $10,000 at 8% over 10 years: annual compounding = $21,589; monthly = $22,196; daily = $22,253. The jump from annual to monthly is meaningful (+$607), but monthly to daily adds only $57. Focus more on your contribution rate and time in the market than compounding frequency.
How much should I invest monthly to reach my goal?
Work backwards from your goal using the future value formula. For example, to have $1 million in 30 years at 7% annual return: you'd need to invest about $820/month starting from zero. The formula: PMT = FV × (r/n) / [((1 + r/n)^(nt) - 1)]. Key insight: starting 10 years earlier cuts your required monthly contribution nearly in half due to compound growth.
What is the difference between ROI and compound annual growth rate (CAGR)?
ROI (Return on Investment) shows total percentage gain: (Final - Initial) / Initial × 100. CAGR shows the smoothed annual growth rate as if the investment grew steadily each year. Example: $10,000 growing to $25,000 over 5 years. ROI = 150%. CAGR = 20.1% per year. CAGR is better for comparing investments of different time periods, while ROI shows your absolute gain.