Ruler.im

Years ago, when a classmate asked if I had a measuring tape, I instinctively handed over my charging cable and looked up its length. That Aha moment sparked the vision for Ruler.im. Today, as an AI Product Manager, I’m building it with AI to bring that simple idea to life.

Ruler.im helps you measure real-world items like shoe sizes or body measurements. It also lets you scale online images to actual centimeters or inches, making it easy to prep for printing or 3D modeling. Think of it as a calibrated digital canvas that restores objects to their true-to-life size on your screen, serving as a "what you see is what you get" tool for better communication.

With a suite of tools including coordinate rulers, center-find tools, circular scales, tape measures, and protractors—all with built-in distance tracking—Ruler.im is more than just a utility; it’s an intuitive learning tool.

Great tool for bridging the digital-physical gap! Ruler.im solves a real problem by letting you see images at their actual size on screen. Super handy for online shopping, 3D printing prep, or any time you need accurate measurements. The calibrated canvas approach is simple but effective. Just remember accuracy depends on proper screen calibration. Recommended for designers, makers, and anyone who needs precise measurements!

Interesting tool... so what is the most useful scenario for you to use ruler lol

just a small advise, when I go to the website, I could not figure out how to use it. maybe put a gudiance section or short vedio of real case.