ROI Calculator
Calculate return on investment as a percentage.
ROI measurements
Enter your values, then calculate.
Result
How to calculate roi
Return on Investment (ROI) measures the percentage gain or loss on an investment relative to its cost — one of the most widely used financial performance metrics.
How the calculation works
ROI = ((Final value − Cost of investment) ÷ Cost of investment) × 100.
Example
A $5,000 investment growing to $6,500: ((6,500−5,000)÷5,000)×100 = 30%.
Frequently asked questions
How is ROI calculated?
ROI = (([Final value] − [Cost of investment]) ÷ [Cost of investment]) × 100.
Is the ROI Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
ROI Calculator
ROI = ((Final value − Cost of investment) ÷ Cost of investment) × 100.
Let's understand your roi result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for ROI
- ROI doesn't account for the time period over which the gain occurred — a 30% ROI over 1 year is very different from 30% over 10 years, so compare alongside timeframe.
- A negative ROI means the investment lost value relative to its cost.
Common ROI Mistakes to Avoid
- Comparing ROI figures from investments held over very different time periods without also considering the timeframe, which is essential context for evaluating the result.
When to Use This Calculator
Return on Investment (ROI) measures the percentage gain or loss on an investment relative to its cost — one of the most widely used financial performance metrics.