ROI Calculator
Return on investment as a percentage.
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How it works
ROI = (final value − amount invested) ÷ amount invested × 100.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.