ABOUT EASY ONLINE RULER
A practical ruler for the screen in front of you.
Easy Online Ruler is a free browser tool for quick, convenient measurements on phones, tablets, laptops, and desktop displays.
What we make
Easy Online Ruler turns your display into a configurable measurement reference. Choose inches, centimeters, millimeters, or other supported units, calibrate the scale for your screen, and measure directly in your browser.
Designed for everyday checks
The ruler is useful for crafts, school projects, design work, packaging, repairs, and other short measurements where a physical ruler is not nearby. Calibration matters because displays vary, so the tool provides several ways to match the on-screen scale to a known device or object.
Accuracy and responsible use
For best results, keep browser zoom at 100%, calibrate before measuring, and verify important dimensions with a physical instrument. Easy Online Ruler is a convenience tool and should not be the sole reference for safety-critical, medical, legal, or precision manufacturing decisions.