ROI Calculator
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Calculate your return on investment instantly. Enter what you invested and what you got back to see your ROI percentage and net profit.
Calculate your return on investment instantly. Enter what you invested and what you got back to see your ROI percentage and net profit.
Return on Investment (ROI) measures the gain or loss generated from an investment relative to its cost. It is one of the most widely used financial metrics across business, marketing, and personal finance. A positive ROI means your investment grew in value; a negative ROI means you lost money. ROI is always expressed as a percentage, making it easy to compare investments of different sizes.
Formula:
Net Profit = Final Value − Initial Investment
ROI = (Net Profit ÷ Initial Investment) × 100
Example 1 — Positive ROI
Invest £1,000, return £1,500 → Net Profit £500 → ROI 50%
Example 2 — Strong ROI
Invest £5,000, return £8,000 → Net Profit £3,000 → ROI 60%
Example 3 — Negative ROI (loss)
Invest £200, return £180 → Net Loss −£20 → ROI −10%
What is a good ROI?
It depends on the type of investment and the time period. A 7% annual ROI is often cited
as the historical average for stock markets. Marketing campaigns typically target 300–500%+
ROI. Real estate investments commonly aim for 8–12% annually.
Does ROI account for time?
Basic ROI does not factor in how long the investment was held. A 50% ROI over 10 years
is very different from 50% ROI in one year. For time-adjusted returns, you would need to
calculate annualised ROI or use metrics like IRR (Internal Rate of Return).
Can ROI be negative?
Yes. A negative ROI means the final value is less than the initial investment — you have
made a loss. This calculator clearly shows negative ROI in red.