What Is Return on Investment (ROI)?
The Investment Return (ROI) Calculator measures how profitable an investment was: the total return percentage, the net profit, and the annualized (CAGR) return.
Return on investment measures how profitable an investment was, expressed as a percentage of what you put in. It is the universal yardstick for comparing very different opportunities on equal terms — a stock, a property, a marketing campaign or a side project — because it reduces "how much did I make relative to my cost" to a single, comparable number.
How to Use the Calculator
- Enter the initial investment and its final value.
- Set the holding period in years for the annualized figure.
- Read the ROI, net profit and annualized return.
Use Cases: Who Uses an ROI Calculator?
- Investors comparing the profitability of stocks, funds or property deals.
- Business owners and marketers measuring the return on a campaign or purchase.
- Anyone evaluating whether a past investment was worthwhile, and by how much.
- People comparing investments of different sizes or durations on a like-for-like basis.
The ROI and Annualised Return Formulas
Basic ROI is (final value − initial cost) ÷ initial cost × 100, giving the total percentage gain or loss, while the net profit is simply final value minus cost. To compare investments held for different lengths of time, the annualised return — the compound annual growth rate, or CAGR — is (final ÷ initial)^(1 ÷ years) − 1, which expresses the gain as a steady yearly rate.
The annualised figure matters because a 50% total return over one year is far better than the same 50% over ten. CAGR strips out the time element so two investments can be judged fairly, regardless of how long each was held.
Benefits and Use Cases
- Compare investments of different sizes on equal footing.
- Convert a total return into a comparable yearly rate.
- Runs entirely in your browser — your figures stay private.
Privacy First: Why Use Fastway Tools?
Every calculation runs in your browser. The investment figures you enter are never uploaded, logged or stored on our servers — the maths happens in client-side JavaScript on your own device. That keeps your numbers private, and the calculator stays instant and usable offline once the page has loaded.