ROI Calculator
See the percentage return on a cost.
Runs locally in your browser — your numbers never leave this pageTry: Total gain=15000, Total cost=10000 → $15,000, $10,000, $5,000, 50.00%
How to use
Return on investment measures profit relative to cost. It ignores time, so a 50% ROI over 10 years is very different from 50% in a month.
Formula
ROI = (Gain − Cost) / Cost
FAQ
Does ROI account for time?
No. For time-adjusted returns use CAGR or IRR.
Should I include all costs?
Yes — fees, taxes and hidden costs give a truer ROI.
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