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ROI Calculator

Enter your investment and profit (or final amount) to instantly calculate ROI. Add a holding period to get the annualized return, and compare multiple investments side by side.

Last updated: 2026/10/16 Finance Feedback & bug reports
JPY
JPY
JPY
years
ROI (Return on Investment)
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Net Profit
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Final Amount
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Annualized Return (per year)
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Shown when a holding period is entered
Compare Investments

No items yet. Enter values and click "Add to Comparison".

Name Investment Net Profit ROI Per Year Remove
* This tool is for general informational and estimation purposes only and is not a recommendation to buy or sell any financial product. Taxes, fees, currency effects, and dividend reinvestment are not included. Make investment decisions at your own responsibility.

Formulas Used

ROI = Profit ÷ Investment × 100 (%)

ROI (Return On Investment) shows how much profit you earned relative to the amount invested. 100% means profit equal to your investment; a negative value means a loss.

Annualized = (Final Amount ÷ Investment)1÷years - 1 (%)

The annualized return (CAGR) is the average compound growth rate per year, letting you fairly compare investments held over different periods.

How to Use

1

Choose Input Method

Pick "From Profit" or "From Final Amount" to match the numbers you have. Use the former if you know the profit, the latter if you know the total returned.

2

Enter Amounts

Enter your investment and profit (or final amount). Toggle "Input in 10,000 JPY" to enter in man-yen units, and add a holding period to get the annualized return.

3

View Results

ROI, net profit, final amount, and annualized return update in real time.

4

Compare Investments

Use "Add to Comparison" to line up multiple investments and see which is most efficient.

About the ROI Calculator

ROI (Return On Investment) expresses, as a percentage, how much profit you earned relative to the money you put in. This tool calculates ROI instantly from your investment and profit (or final amount), and can also compute the annualized return (CAGR) when you add a holding period. You can line up multiple investments to compare the efficiency of stocks, real estate, business initiatives, and more. All calculations run entirely in your browser, so your input data is never sent to any server.

Features

  • Two Input MethodsEnter either the profit or the final amount, whichever number you have on hand.
  • Annualized ReturnAdd a holding period to get the per-year compound rate (CAGR) and fairly compare investments of different lengths.
  • Compare Multiple InvestmentsAdd investments to a list and compare ROI and annualized return side by side.
  • Privacy ProtectedAll calculations happen in your browser. Your amounts are never sent to a server.

Use Cases

  • Check the return rate of stocks and mutual funds
  • Simulate the yield of a real estate investment
  • Measure the ROI of advertising and marketing campaigns
  • Compare the efficiency of side hustles and small businesses
  • Compare investments held for different periods by annual rate

FAQ

What is ROI (Return on Investment)?
ROI shows profit as a percentage of the amount invested. The formula is "Profit ÷ Investment × 100". For example, investing 1,000,000 and earning 200,000 in profit gives a 20% ROI. A negative value means a loss.
How is ROI different from the annualized return?
ROI shows the total return regardless of how long you held the investment, while the annualized return (CAGR) shows the average growth per year. A 50% ROI over 5 years works out to about 8.4% per year. Use the annualized figure when comparing investments held for different periods.
What does "Input in 10,000 JPY" mean?
When checked, your entered numbers are treated in units of 10,000 JPY (man-yen). For example, entering "100" is calculated as 1,000,000 JPY. It is handy for entering large amounts quickly.
Are taxes and fees included?
No. This tool provides estimates and does not account for taxes, trading fees, currency effects, or dividend reinvestment. Your actual after-tax return will differ. Check specialized tools or a professional for precise figures.
Is this investment advice? Is my data safe?
This tool is for general information and estimation only and is not investment advice or a recommendation to buy or sell any product. In addition, all calculations run entirely in your browser, and your amounts and names are never sent to or stored on any server, so you can use it with confidence.

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Related Guides

What Is ROI? The Formula, Worked Examples, Annualizing, and ROAS vs. Yield Learn what ROI (Return On Investment) is from the ground up: the meaning of the formula profit ÷ investment × 100, worked examples, how to annualize it over a holding period, how it differs from ROAS and yield, and how to use it in investment decisions and its limits.