How it works
Fill in the 2 fields above and ROI Calculator calculates the result instantly, recalculating as you change any value. It applies the formula ROI = (gain − cost) / cost × 100. The math runs locally in your browser — nothing is sent to a server.
Formula
ROI = (gain − cost) / cost × 100Examples
- Initial investment 5000, Final value 7500 → ROI: 50%
Frequently asked questions
How do I use the ROI Calculator?
Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
What formula does the ROI Calculator use?
It uses ROI = (gain − cost) / cost × 100. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The ROI Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the ROI Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on finance and the rest of the platform, you can use it as often as you like.
Popular in Finance
Salary Converter
Convert an hourly wage to weekly, monthly and annual salary.
Credit Card Payoff Calculator
See how long it takes to pay off a credit card balance.
Future Value of Savings Calculator
Project savings growth with regular monthly contributions.
Markup Calculator
Calculate selling price and profit from cost and markup percentage.