How it works
Measure net return relative to the total invested cost. This does not annualize the return or account for cash-flow timing.
ROI = (proceeds−initial−costs)/(initial+costs) × 100
Worked example
Show example inputs and result
Initial investment: 10,000 · Final proceeds: 12,000 · Additional costs: 200.
- ROI
- 17.64705882 %
- Net gain
- 1,800
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy