How to use the ROI Calculator
Enter the amount invested and the final value. ROI compares the gain or loss with the original cost. Use the result for scenario planning rather than as a forecast. Keep the rate, compounding assumption, contribution schedule, and time horizon consistent when comparing outcomes.
What this calculator does
Calculate return on investment from cost and ending value. It is intended to make the calculation transparent and repeatable: you provide the known values, the calculator applies the relevant relationship, and the result is shown with the units or labels used by the tool.
When this tool is useful
Use the ROI Calculator when you need a quick, repeatable check and already have the inputs requested by the page. It is useful for comparing scenarios, checking hand calculations, planning a task, or understanding how changing one input affects the result.
How the calculation works
ROI is calculated as gain or loss divided by the original investment cost, multiplied by 100.
Practical example
For example, if an investment costs $1,000 and later has a value of $1,200, the simple gain is $200 before taxes, fees, or cash flows.
Things to keep in mind
- Future returns and interest rates are not guaranteed; changing rates can materially change the result.
- Taxes, fees, inflation, contribution timing, and withdrawals may not be included unless the calculator explicitly models them.
- Use realistic assumptions and compare more than one scenario before making an investment or savings decision.