ROI Calculator
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Return on Investment (ROI) measures the efficiency of an investment as a percentage gain or loss relative to cost. It is used to compare profitability across different investments, regardless of size.
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Tip: Always compare annualized ROI when investments have different durations. A 50% return over 10 years is actually only 4.1% per year — less impressive than a 3-year 30% return (9.1%/yr).
- 1ROI = (Net Gain / Cost of Investment) × 100%
- 2Net Gain = Final Value − Initial Cost
- 3Annualized ROI = ((1 + ROI)^(1/years) − 1) × 100%
- 4ROI does not account for the time value of money unless annualized
Bought $10,000 stock, sold for $13,500 after 2 years=ROI = 35%, Annualized = 16.2%
Invested $5,000 in education, earned $15,000 more/yr=ROI = 300% per yearHuman capital ROI
| Investment Type | Avg Annual ROI | Risk Level |
|---|---|---|
| S&P 500 (long-term) | 10–11% | Medium |
| Real estate | 8–12% | Medium |
| High-yield savings | 4–5% | Very low |
| Small business | 15–30% | High |
| Education/skills | 10–20%+ | Low |
| Crypto (varies wildly) | Unpredictable | Very high |
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Fun Fact
Warren Buffett has achieved an annualized ROI of roughly 20% over 55+ years — turning $10,000 into over $270 million. The S&P 500 over the same period returned about 10% annually.
References
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