ROI Calculator
Calculate the exact Return on Investment (ROI) percentage. Get instant step-by-step solutions — completely free, no signup required.
Free ROI Calculator Calculator
Enter your problem below to get an instant step-by-step solution.
About ROI Calculator
Calculate the exact Return on Investment (ROI) percentage. Financial mathematics applies arithmetic and algebra to calculate interest, investments, loans, and returns. These tools are used in personal finance and business.
Our ROI Calculator calculator handles every type of problem in this topic. Whether you are a student working through homework, preparing for an exam, or a professional needing a quick calculation, you can enter any roi calculator expression and receive a complete, verified solution with every step shown.
ROI Calculator Formula
ROI = (Final value − Cost) / Cost × 100%
Return on investment measures the profit of an investment relative to what it cost, as a percentage. It is quick to compare options, but it ignores time — for multi-year investments, annualised return (CAGR) is a fairer comparison.
Worked Example
You buy shares for $2,500 and sell them for $3,100. Find the ROI.
- Gain: 3,100 − 2,500 = 600
- Divide by cost: 600 / 2,500 = 0.24
- Convert to a percentage: 0.24 × 100 = 24%
Answer: ROI = 24%
Common Mistakes to Avoid
- Dividing by the final value instead of the cost.
- Leaving out fees, taxes or other costs.
- Comparing ROIs over different time periods without annualising.
How to Use the ROI Calculator Calculator
- 1
Type your ROI Calculator problem into the input field above
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Press Enter or click the Solve button to run the calculation
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Review the step-by-step solution that appears below the input
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Check the breakdown of each operation to understand the method
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Try a different problem to practice and build your understanding
Frequently Asked Questions
What is the ROI Calculator formula?
ROI = (Final value − Cost) / Cost × 100%. Return on investment measures the profit of an investment relative to what it cost, as a percentage. It is quick to compare options, but it ignores time — for multi-year investments, annualised return (CAGR) is a fairer comparison.
Can you show a worked ROI Calculator example?
You buy shares for $2,500 and sell them for $3,100. Find the ROI.: Gain: 3,100 − 2,500 = 600; Divide by cost: 600 / 2,500 = 0.24; Convert to a percentage: 0.24 × 100 = 24%. Answer: ROI = 24%.
Is this ROI Calculator calculator free to use?
Yes — the ROI Calculator calculator on MathSimplify is completely free. There is no signup, no subscription, and no usage limit. Enter any problem and get the step-by-step solution instantly.
Can I use this for ROI Calculator homework and exam practice?
Absolutely. The step-by-step breakdown is designed specifically for learning. You can use it to check your work, understand where you went wrong, or study the method before an exam. The calculator shows the full working, not just the final answer.