Return on Investment Calculator

About this calculator

This calculator finds return on investment, ROI = (net gain − cost of investment) / cost of investment × 100, expressing the profit or loss from an investment as a percentage of what was originally put in. It's a simple, universal profitability metric that doesn't account for the time value of money or holding period — unlike annualized return or IRR — which is why it's best used to compare investments of similar duration.

Business owners, marketers evaluating campaign spend, real estate investors, and everyday investors use ROI to judge whether a purchase, project or investment paid off relative to its cost. Enter the initial cost and the final/net gain to get the ROI percentage.