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ROI calculator (return on investment)

Calculate the return on investment (ROI) and profit from the amount invested and the amount returned.

$
$
ROI
50%
Profit (or loss)$500.00
Multiple1.5×

ROI measures the percentage gain over what was invested. A negative ROI means a loss.

Guide What is ROI and how to calculate it Interactive lesson: The math that sinks small businesses Buy at $100 and sell at $150: the margin is not 50%, it is 33%. See why the two numbers never match. Glossary · MoneyMojisROI measures investment gain. Understand capital gains.

How the calculation works

ROI (Return On Investment) measures the profit relative to what you put in. It is the most direct answer to "was this investment worth it?".

ROI = (amount returned − amount invested) ÷ amount invested × 100

Step-by-step example

Invested R$1,000 and got R$1,500 back:

  1. Profit: 1,500 − 1,000 = R$500
  2. ROI: 500 ÷ 1,000 × 100 = 50%

The big limitation: time

ROI ignores the term. 50% in 1 year is excellent; 50% over 10 years is poor. To compare different durations, use CAGR (annualized return).

Watch out

  • Include all costs in the amount invested (fees, taxes, shipping).
  • In marketing, "returned" is usually the revenue from the campaign and "invested" is its cost.

Examples

  • Invest R$1,000, get R$1,500: ROI = 50%.
  • A campaign costing R$2,000 that generated R$3,000: ROI = 50%.

Frequently asked questions

Does ROI account for time?

No. To compare different periods, use CAGR (annualized return).

ROI vs profit margin?

Margin relates profit to revenue (selling price). ROI relates profit to the amount invested — different questions.

What is a good ROI?

It depends on risk and term. A ROI is only "good" if it beats what a safe investment would yield in the same period.

Is a 50% ROI good?

It depends on the timeframe, which the formula ignores. Convert to an annual basis before comparing.

What belongs in the invested amount?

Everything spent: fees, taxes, your own time and indirect costs — plus opportunity cost.

Does high ROI mean a good investment?

Not necessarily — ROI ignores risk. Returns far above market imply risk far above market, or fraud.

How do I compute marketing ROI?

Use profit, not revenue, and be careful with attribution — sales that would have happened anyway are not campaign return.

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Updated on June 18, 2026 · by Rafael Rossi · Methodology & sources