Free ROI Calculator
Enter your investment cost, expected return, and time period — get ROI %, payback period, and annualized return calculated instantly.
Your ROI, payback period, and annualized return will appear here.
How is ROI calculated?
Return on investment (ROI) measures how much profit an investment generated relative to its cost: ROI % = (Net Profit ÷ Investment Cost) × 100, where net profit is your total return minus your original cost. This free ROI calculator also works out your payback period — how long it takes the investment to pay for itself — and an annualized return, so you can compare investments of different lengths on equal footing.
Payback period is calculated as Investment Cost ÷ (Total Return ÷ Time Period), giving you the average time to break even. Annualized return uses a compound growth formula so a 50% return over 5 years isn't mistaken for a 50% return in one year.
All calculations run in your browser — nothing is sent anywhere. For a full financial statement built around numbers like these, the AI Balance Sheet Generator skill on KissMySkills turns Claude or ChatGPT into a finance formatting assistant.
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