ROI Calculator Guide
A return on investment (ROI) calculator measures the percentage gain or loss on an investment relative to its cost, providing a standardized way to compare the profitability of different investments.
What Is ROI?
Return on Investment (ROI) is calculated as (Net Profit / Cost of Investment) × 100. It expresses gain or loss as a percentage of the original investment, making it easy to compare investments of different sizes and types.
Key Inputs
Initial Investment
The total amount of capital deployed, including purchase price, transaction fees, and any initial costs required to make the investment operational.
Final Value or Proceeds
The total amount received when the investment is sold or liquidated, including any income generated during the holding period (dividends, rental income, etc.).
Annualized ROI
Simple ROI does not account for time. A 50% return over 5 years is very different from 50% over 1 year. Annualized ROI adjusts for holding period using the formula: ((1 + ROI)^(1/years) – 1) × 100. This gives you a comparable annual rate of return.
Limitations of ROI
ROI does not account for risk, does not consider the time value of money (unlike NPV or IRR), and can be manipulated by how costs are categorized. Always use ROI alongside other metrics like IRR, payback period, and risk-adjusted returns for investment decisions.
Related Guides
A compound interest calculator shows how your investment grows over time when earned interest is reinvested to generate additional interest, illustrating the exponential effect of compounding.
DCF Valuation Calculator GuideA discounted cash flow (DCF) calculator estimates the present value of an investment based on projected future cash flows, discounted back at a rate reflecting the investment risk.