ROI Calculator
Measure return on investment for a project, campaign, purchase, or investment.
ROI formula
ROI = net profit divided by total investment, multiplied by 100. This calculator treats extra costs as part of the total investment so the return is not overstated.
Frequently asked questions
What counts as investment?
Include the original purchase or campaign spend plus fees, tools, labor, maintenance, and other costs needed to earn the return.
What is annualized ROI?
Annualized ROI converts a return over any period into an approximate yearly rate, which makes short and long investments easier to compare.
Is ROI the same as profit margin?
No. ROI compares profit to the money invested. Profit margin compares profit to revenue.
Last updated: 2026-07-12