ROI Calculator
Calculate simple return on investment percentage and net gain.
Advanced ROI & Investment Return Calculator
Use Simple ROI for a quick investment comparison or Advanced Project ROI for costs, cash flows, payback, NPV and IRR.
Optional custom cash flows
If entered, these net cash flows replace the repeated per-period revenue/cost pattern above. Enter comma-separated values, excluding the initial investment.
Cumulative cash-flow chart
Red shows cumulative cash flow below break-even, green shows cumulative cash flow above break-even, and the gold dashed line marks zero.
ROI composition
Cash-flow schedule
| Period | Cash flow | Cumulative | Discounted flow |
|---|
Return on investment, annualized return, NPV and IRR
Simple ROI compares net gain or loss with the original investment. Annualized ROI/CAGR incorporates holding period, while NPV discounts a series of cash flows and IRR estimates the discount rate that makes their NPV approximately zero. These measures answer different questions and should not be treated as interchangeable.
For project decisions, MesraTools shows multiple metrics rather than automatically declaring the highest ROI option to be the “best” investment.
Understand ROI Calculator
ROI Calculator converts your entered assumptions into a numerical estimate so you can understand the result, compare alternatives and make a more informed planning decision.
When this tool is useful
Use it for planning, comparison and what-if analysis before committing to a financial, time, health or everyday decision.
How to use it well
Enter the requested values carefully, confirm units and percentages, run the calculation, then review the headline result together with the breakdown and assumptions.
How to interpret the result
Review ROI percentage together with investment cost, net profit, cash-flow timing and break-even point. A high percentage can still hide timing or risk differences.
Practical suggestions
- Compare ROI with the time required to earn it.
- Include all material costs rather than only the purchase price.
- Test a downside scenario before using ROI to choose between investments or projects.
Visualization: This tool is suitable for a meaningful chart or scenario visualization. When a chart is available, use it together with the numerical/table result rather than as a decorative graphic.
Example workflow
Example workflow: enter a representative roi calculator input, run the tool, review the output, then change one important input and compare the difference.
Important limitations
This calculator provides an estimate from the stated inputs and rules. It does not guarantee future outcomes and should not replace regulated financial, medical, legal or other professional advice where applicable.
Privacy: Where the page states that processing is browser-local, your entered content stays in the browser during normal processing. Any tool that requires server or third-party processing must disclose that separately.