Return on Investment (ROI) Calculator - Simple & Annualized
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📈 Return on Investment (ROI) Calculator

Calculate the simple percentage ROI and the annualized return for any investment or project.

Investment Parameters

Total amount spent to acquire the asset.
Total value upon sale or final revenue.
Any profits earned during the holding period.
How long the investment was held (used for Annualized ROI).

What is the Return on Investment (ROI) Calculator?

The **Return on Investment (ROI) Calculator** is the most basic and widely used financial metric to determine the profitability of an investment. It measures the gain or loss generated on an investment relative to the money invested. It is typically expressed as a percentage and serves as a simple gauge of efficiency.

Why You Need This Tool and Its Purpose

ROI is essential for quickly comparing different investment opportunities or evaluating the success of past projects. This calculator serves two main purposes:

  1. **Simple Performance Measurement:** It gives you a clear percentage that shows how much you earned for every dollar you put in. A higher ROI indicates better performance.
  2. **Annualized Comparison:** Because ROI does not inherently account for the time the money was tied up, the tool also calculates the **Annualized ROI**. This allows you to accurately compare a short-term investment (e.g., 20% over 6 months) against a long-term investment (e.g., 20% over 5 years).
The calculator helps you determine if a venture was financially worthwhile and how its returns stack up against other options.

How This Calculator Works

The calculator uses two primary formulas: the simple ROI formula and the annualized return formula.

  1. **Simple ROI Formula:** This calculates the overall return, regardless of the time period.

    ROI (%) = [ (Ending Value - Initial Cost + Net Income) / Initial Cost ] × 100

  2. **Net Gain:** This is the numerator of the ROI formula, representing the total profit.

    Net Gain = Ending Value - Initial Cost + Net Income

  3. **Annualized ROI Formula:** This adjusts the ROI to an average annual compounded rate, making time periods comparable.

    Annualized ROI = [ (1 + Simple ROI)(1 / Years Held) - 1 ] × 100

All calculations are performed by converting percentage rates to decimals internally and then presenting the final results as clear percentages and currency values.