ROI Calculator

ROI Calculator is a free, browser-based tool from SmartTools. Return on investment in percent. Everything runs on your own device — your files and text never leave your phone or computer, nothing is uploaded to a server, and no account or login is needed. Open the page, use the tool, download or copy your result, and you are done.

1. Open the ROI Calculator workspace at the top of this page.
2. Add your input — pick a file, type or paste your text, or move the controls.
3. The result updates instantly in your browser as you work.
4. Download, copy or save the result. Nothing is stored after you close the tab.

ROI Calculator works entirely inside your browser using client-side code. We do not upload, copy, store or share your files, text or results, and we keep no logs of what you process here. Because processing happens on your device, results depend on your browser and device capability, and the tool is provided as-is without warranty for critical, legal or financial use — please check important output yourself. Some tools that need live data (currency rates, translation, network checks) send only the minimum request needed to a public third-party service. Use SmartTools only with content you own or have permission to edit. Questions or takedown requests: bahaigamarbhola@gmail.com.