ROI Calculator
Invested this, got that back: what percent return?
Verified against sourcesLast verified 25 September 2026
Your numbers
THB
THB
Sale value + dividends or income received along the way
Result
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Tested examples
Every example below is an automated test. Click one to try it.
Formula
- Gain = total received − invested
- ROI = gain ÷ invested × 100
Assumptions
- Count everything received, including dividends or rent
- Taxes and fees are not deducted; subtract them from the amount received if you want them included
Sources
OpenStax (Rice University)
Principles of Finance, §15.1 Risk and Return to an Individual Assetaccessed 25 September 2026
Internal reference: reference/06_roi.md
FAQ
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