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ROI Calculator
Return on investment (ROI) measures how much you gained or lost relative to what you put in. Use it to compare investments, projects or marketing campaigns on the same scale.
ROI — return on investment — compresses any spend into one comparable number: how much came back for each unit put in. This calculator gives it in money and percent, for a product launch, an ad campaign, a machine, or a course.
How to use this calculator
- Enter the total amount invested (all costs, not just the obvious one).
- Enter the total amount returned or earned from it.
- Press calculate to see the gain and the ROI percentage.
Include every cost or the number lies
ROI is only honest when the investment side carries everything: fees, tools, ads and the hours spent, valued at something. Campaigns that look like 300% returns at a glance often settle near break-even fully loaded, and knowing that before the next spend is the entire point of this calculator.
Frequently asked questions
What is the ROI formula?
ROI = (amount returned − amount invested) divided by amount invested, times 100.
What is a good ROI?
Any positive ROI beats break-even, but the bar should be your alternatives and the risk involved. Low-risk returns set the floor; risky ventures must clear it comfortably.
Why does ROI ignore time?
In its simple form, yes, it does. 50% over a year and 50% over five years show identically here; pair ROI with the period, or use annualised measures, when time differs a lot.