Return on investment (ROI) calculator
ROI = (gain − cost) / cost
How to use Return on investment (ROI) calculator
- Enter your investment cost and the gain (or current value).
- ROI calculates as (gain − cost) ÷ cost, shown as a percentage.
- Use this to compare returns across different investments on equal footing.
Example
$1,000 invested, now worth $1,250: gives ROI = (1,250 − 1,000) ÷ 1,000 = 25%.
About this tool
Return on investment (ROI) calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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