ROI Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the amount invested and amount returned.
- Press Calculate.
How it works
ROI = (returned − invested) ÷ invested × 100 — the percentage gain or loss.
Worked example
$1,000 → $1,500. = 50% ROI, $500 profit.
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Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.