I’m excited to share RulerInches, a free online screen ruler that makes measuring objects directly on your screen simple and accurate. The idea came from a surprisingly common frustration: most online rulers either require manual calibration every time, don’t work well across different devices, or produce inconsistent measurements. I wanted something that just worked. So I built RulerInches with: * 📏 Accurate measurements in inches, centimeters, millimeters, and pixels * 📱 Automatic device detection for phones, tablets, laptops, and desktops * 🎯 Smart calibration for better accuracy across screen sizes * ⚡ No downloads, accounts, or installations required Building it wasn’t just about drawing a ruler. The biggest challenge was making measurements reliable across hundreds of devices with different screen sizes, pixel densities, and browser behaviors. I spent a lot of time refining the calibration system to make the experience as seamless as possible. This is just the beginning. I’m planning to add more measurement tools, accessibility improvements, and features based on your feedback.

RulerInches

Your Digital Ruler for Every Screen

Your Digital Ruler for Every Screen