About ROI Calculator

ROI Calculator is a free, browser-based tool designed to help individuals and businesses quickly evaluate investment performance using the Return on Investment metric.

Key Features

Instant ROI Calculation — Enter your initial investment and final value to see your ROI percentage and net profit or loss immediately.

Annualized Returns — Optionally add the investment duration to calculate the annualized ROI, making it easy to compare investments held for different time periods.

Investment Comparison — Use the comparison table to evaluate multiple investments side by side and identify the best performers.

Privacy First

All calculations are performed locally in your browser. No financial data is ever transmitted to our servers or stored anywhere. Your information stays on your device.

Who Is This For?

Whether you're a student learning about finance, an individual investor evaluating opportunities, or a business professional assessing marketing spend, ROI Calculator provides a quick and reliable way to measure investment performance.