How to use this tool
Enter the initial investment and final value or proceeds and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
Formula
ROI = (final value − initial investment) ÷ initial investment × 100.
Example
An investment of 10,000 that returns 12,500 has a simple ROI of 25%.
Prepare your inputs
Include the initial outlay and final proceeds on a consistent basis. Decide whether costs and distributions are included before comparing projects.
Understand the result
Simple ROI does not annualize returns. A 25% return over one year and over five years are not equivalent investments.
About this version
This page uses a shared calculation method. Industry and country labels provide a browsing context; they do not change the formula or imply specialist or local regulatory validation. Currency labels do not perform currency conversion.
Limitations and assumptions
Simple ROI ignores cash-flow timing, taxes, fees, inflation and risk. It is not investment advice. Detailed content, accessibility and edge-case review remains ongoing.