ROI Calculator (Return on Investment + CAGR)

ROI stands for return on investment. It describes how much value you gained or lost compared to what you invested. ROI is a simple, easy-to-read metric that helps you compare outcomes across different projects or investments. It answers a basic question: how much did I get back relative to what I put in?

ROI is most useful for quick comparisons and summaries. It is not a full financial model, but it is a helpful first step for understanding performance.

The basic calculation uses three values: the initial investment, any additional investment, and the final value.

• Profit = final value - total investment
• ROI percent = (profit / total investment) * 100
• Return multiple = final value / total investment

If the final value is larger than the total investment, ROI is positive. If it is smaller, ROI is negative and represents a loss.

ROI shows total return. CAGR, or compound annual growth rate, shows the average annual growth rate over time. ROI does not account for time, so a 50% return over one year is very different from a 50% return over ten years. CAGR helps you compare investments with different timelines by normalizing the return per year.

CAGR is calculated as:

• CAGR = (final value / total investment)^(1/years) - 1

If you do not provide a time period, the calculator shows ROI but not CAGR.

ROI looks simple, but it hides important context. Consider two investments:

• Investment A: 50% ROI in 1 year
• Investment B: 50% ROI in 5 years

They both show 50% ROI, but the annualized growth is very different. That is why CAGR is useful. ROI also ignores risk, volatility, and timing of intermediate cash flows, so it should be treated as a summary metric rather than a full evaluation.

1. Simple investment gain

• Initial investment: 5,000
• Final value: 8,000
• Profit: 3,000
• ROI: 60%

2. Loss example

• Initial investment: 10,000
• Final value: 8,500
• Profit: -1,500
• ROI: -15%

3. Real estate example

• Initial investment: 50,000
• Additional investment: 5,000
• Final value: 75,000
• Total investment: 55,000
• ROI: 36.36%

4. Startup example

• Initial investment: 20,000
• Final value: 120,000
• ROI: 500%
• Return multiple: 6.0x

5. Multi-year comparison

• Investment: 10,000 to 16,000 over 4 years
• ROI: 60%
• CAGR: about 12.5%

6. Same ROI, different time

• 50% ROI in 1 year vs 50% ROI in 5 years
• CAGR for 1 year is 50%
• CAGR for 5 years is about 8.45%

7. Small vs large investment

• Investment A: 1,000 to 1,500
• ROI: 50%
• Investment B: 100,000 to 150,000
• ROI: 50%

Same ROI, but the dollar profit is very different.

8. Additional capital added

• Initial investment: 5,000
• Additional investment: 2,000
• Final value: 9,000
• Total investment: 7,000
• ROI: 28.57%

ROI compares profit to the original investment. The tool calculates profit, ROI percentage, and optional CAGR when you provide a time horizon.

Use this tool when comparing investments, projects, or marketing spend. It helps you standardize returns across different sizes and timeframes.