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Calculate your Return on Investment (ROI) instantly.
Our free ROI calculator helps you measure the profitability of any investment. Enter your initial cost and final value to instantly see your ROI percentage and net profit. The calculator is designed to give a fast answer, but the quality of the answer still depends on accurate inputs and a clear idea of what decision you are trying to support.
- Enter Initial Investment and Final Value using the same units you plan to compare or report.
- Read the main roi first, then use the supporting outputs to understand the trade-offs behind that result.
- Compare your numbers with the worked examples below if you want a quick reasonableness check.
ROI turns raw gain or loss into a comparable rate so you can judge whether the return is strong relative to the capital committed. On this page, the primary output is roi.
Scenario 1: $10,000 investment that grew to $13,500. Inputs used: initialCost: 10000, finalValue: 13500. Example result: 35% ROI. A $10,000 investment worth $13,500 gives a net profit of $3,500 and an ROI of 35%. Scenario 2: $5,000 investment that lost value to $4,200. Inputs used: initialCost: 5000, finalValue: 4200. Example result: -16% ROI. A $5,000 investment now worth $4,200 represents a loss of $800, or -16% ROI.
Core formula: ROI = (final value - initial cost) / initial cost * 100. Return on investment compares net profit or loss with the original amount invested so you can evaluate performance proportionally.
- Positive ROI means the investment gained value.
- Negative ROI means the investment lost value.
Use this calculator when comparing investments, campaigns, projects, or purchases that should generate measurable return. Related paths for follow-up analysis include compound interest calculator, loan calculator, and profit margin calculator.
Most bad outputs come from a few repeated input errors or interpretation mistakes. Use this short checklist before relying on the result.
- Comparing ROI without considering time horizon.
- Ignoring cash flows or additional costs outside the simple two-point comparison.
- Using ROI alone when risk level differs sharply between options.
