Return on Investment (ROI) Calculator
ROI calculator for investments, projects, and campaigns using initial cost, ending value, income received, and additional costs.
Return on investment compares net gain with the original investment. Use it to evaluate a project, campaign, asset, or other decision with measurable costs and returns.
ROI does not account for time by itself. Two investments with the same ROI can be very different if one takes months and the other takes years.
Frequently asked questions
What is the ROI formula?
ROI equals net gain divided by initial investment, multiplied by 100. This tool subtracts additional costs from the gain.
Does ROI measure risk?
No. It does not capture volatility, uncertainty, liquidity, taxes, or the chance of loss.
How do I compare different time periods?
Use an annualized return calculation when investment periods differ. Simple ROI alone does not adjust for time.