📖 Overview
Use this tool to compare investment outcomes using a standardized return metric.
🧪 Example Scenarios
Use these default and higher-pressure example inputs to explore how sensitive this calculator is before using your real numbers.
| Input | Base Case | Higher Pressure Case |
|---|---|---|
| Final Value ($) | 14,000 | 16,100 |
| Initial Cost ($) | 10,000 | 12,000 |
⚙️ How It Works
This computes return on investment as (final value - initial cost) divided by initial cost, then multiplied by 100.
The Formula
ROI = [(Final Value − Cost) ÷ Cost] × 100
| ROI | Return on Investment, expressed as a percentage |
| Final Value | Current or exit value of the investment |
| Cost | Original amount invested (cost basis) |
💡ROI does not account for time. A 50% ROI over 10 years is very different from 50% over 1 year. Consider annualizing returns when comparing across different holding periods.
Quick Reference
| Cost | Final Value | ROI |
|---|---|---|
| $10,000 | $12,000 | +20% |
| $10,000 | $15,000 | +50% |
| $10,000 | $8,500 | −15% |
| $50,000 | $75,000 | +50% |
When To Use This
- Use this tool when you need a fast decision during active planning or execution.
- Use this before committing money, time, or tradeoffs that are hard to reverse.
- Use this to compare options using the same assumptions across scenarios.
Edge Cases To Watch
- Results can be misleading if key inputs are missing, stale, or unrealistic.
- Very small or very large values may amplify rounding effects and interpretation risk.
- If assumptions change mid-decision, recalculate before acting.
Practical Tips
💡 Compare ROI alongside risk and time horizon.
💡 Use the same cost basis across alternatives.
💡 Track ROI repeatedly to identify trend quality.
Frequently Asked Questions
❓ Can ROI be negative?
Yes, if final value is below initial cost.
❓ Is higher ROI always better?
Not if risk, liquidity, or volatility differs substantially.