ROI Calculator
Calculate the return on investment (ROI) of a project, campaign or purchase. Enter what it cost and what it returned to see the percentage return and profit.
How we estimate this
ROI measures how much you gained relative to what you spent: (return − cost) ÷ cost, shown as a percentage. A 100% ROI means you doubled your money; a negative ROI means the investment lost money.
Pricing reviewed: June 2026.
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Understanding rois in Australia
ROI measures how much you gained relative to what you spent: (return − cost) ÷ cost, shown as a percentage. A 100% ROI means you doubled your money; a negative ROI means the investment lost money.
ROI is a simple, powerful comparison tool, but it ignores time. A 50% return over one month is far better than 50% over five years, so always consider the time horizon alongside the percentage.
Frequently asked questions
How do you calculate ROI?
ROI = (total return − total cost) ÷ total cost × 100. So a $25,000 return on a $10,000 cost is a 150% ROI.
What is a good ROI?
It depends on the time frame and risk. Any positive ROI beats a loss, but compare it against the time taken and safer alternatives.
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