The latest articles on DEV Community by Shaurya Sharma (@shaurya_sharma_89564e74d3). https://dev.to/shaurya_sharma_89564e74d3 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4232058%2F21ff26f5-2fda-4881-93db-3f5e5d483479.png https://dev.to/shaurya_sharma_89564e74d3 en Shaurya Sharma Sat, 07 Nov 2026 12:16:42 +0000 https://dev.to/shaurya_sharma_89564e74d3/how-i-built-an-actual-size-screen-ruler-with-hardware-calibration-using-astro-11hk https://dev.to/shaurya_sharma_89564e74d3/how-i-built-an-actual-size-screen-ruler-with-hardware-calibration-using-astro-11hk <p>Most on-screen measurement tools rely purely on standard CSS pixels (96 DPI), which often leads to inaccurate physical readings across modern high-density laptop and mobile displays.</p> <p>To solve this, I built <strong>AI Online Ruler</strong>, a zero-bloat web utility designed to achieve 1:1 physical hardware calibration directly in the browser.</p> <h3> Key Features &amp; Engineering: </h3> <ul> <li> <strong>Zero-JavaScript Overhead:</strong> Built with Astro and deployed on Cloudflare Pages for instant edge loading.</li> <li> <strong>Credit Card / Standard Card Calibration:</strong> Since physical cards follow international standards (ISO/IEC 7810 ID-1: 85.60 mm × 53.98 mm), users can calibrate their screens without needing a physical tape measure.</li> <li> <strong>Multi-Unit Precision:</strong> Real-time measurement across millimeters (mm), centimeters (cm), and inches.</li> <li> <strong>Privacy-First:</strong> 100% client-side execution with no tracking cookies or mandatory registration.</li> </ul> <p>You can test the tool and calibrate your screen here: <a href="https://aionlineruler.com" rel="noopener noreferrer">AI Online Ruler</a></p> <p>Would love feedback from the developer community on handling device pixel ratios across custom ultra-wide monitors!</p> webdev javascript astro showdev