ROI Calculator
Enter what an investment cost and what it returned to get the net gain and ROI percentage.
Simple ROI — ignores time. For multi-year comparisons, annualized return matters more. Not financial advice.
How it works
ROI is the bluntest of the investment metrics — one number, no time dimension. That makes it perfect for quick comparisons (an ad campaign, a flip, a course that raised your rates) and misleading for anything where duration differs. Include every real cost — fees, shipping, taxes, your time if it matters — or the percentage flatters the result.
FAQ
How is ROI calculated?
ROI = (revenue − cost) ÷ cost × 100. Spending 2,000 to get back 2,500 is a 25% ROI.
What's a good ROI?
It depends entirely on time and risk. 25% in one month is spectacular; 25% over ten years badly trails a savings account. Always compare ROI against how long the money was tied up and what else it could have earned.
What are ROI's limitations?
It ignores time, risk, and cash-flow timing. For multi-year decisions, annualized return (CAGR) or IRR gives a fairer comparison.