How this calculator works
Return on investment is commonly calculated as net gain divided by cost, multiplied by 100. The result shows your profit relative to what you originally spent.
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ROI Calculator
Free ROI calculator to estimate return on investment, net profit, and ending value from your cost and gain.
Instant result
Return on investment
15%
Net profit$1,800.00
Ending value$13,800.00
Calculator results are provided for planning and educational purposes. For taxes, legal decisions, lending, or medical advice, verify the numbers with an official source or qualified professional.
About this calculator
Use this ROI calculator to measure how efficiently an investment, marketing campaign, project, or business expense performed. It is especially useful when you want a quick percentage return without building a spreadsheet.
How to use it
- Enter your total net gain or profit.
- Enter the original cost of the investment or project.
- Review the ROI percentage and supporting amounts.
- Compare multiple scenarios to see which option produced the strongest return.
Example
If a project costs $12,000 and generates a net gain of $1,800, the ROI is 15%.
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More ways to explore this calculator
Mega Calculators builds a content cluster around each high-value tool so users can open the live calculator, read the formula, follow a guide, or jump into example pages that match specific search intent.
ROI Calculator formula
Understand the math behind the result.
How to use this calculator
Follow the step-by-step guide.
Use cases and scenarios
See where this tool is most useful.
ROI Calculator for $900 net gain
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ROI Calculator for $1,800 net gain
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ROI Calculator for $3,600 net gain
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Frequently asked questions
What is a good ROI?
That depends on the asset, the risk taken, and the time involved. A good ROI in one industry may be weak in another.
Does ROI include time?
Basic ROI does not. Two investments can have the same ROI but very different timelines, which is why annualized returns can matter.
Can I use this for business spending?
Yes. It works for marketing campaigns, equipment purchases, side projects, and other business decisions where cost and gain are known.