Simple Online Ruler

What it does

Use Simple Online Ruler to measure actual size on screen in centimeters, millimeters, and inches. Calibrate by auto-detecting your device, entering screen diagonal, or matching a credit card.

Use this free online ruler at actual size in centimeters, millimeters, and inches. Calibrate your screen for accurate virtual measurements on any device.

Simple Online Ruler needs JavaScript to calibrate and draw actual-size tick marks. Use this free actual-size online ruler in centimeters, millimeters, or inches. Calibrate your screen first so the on-screen scale matches real-world size. An online ruler is a browser-based measuring tool that shows centimeter, millimeter, and inch marks at their true physical size on your screen. After calibration, you can take quick measurements without a physical ruler, with no download or account. Learn more about how accurate an online ruler is or see the online ruler vs physical ruler comparison . The top and bottom edges create a horizontal scale. Turn on the left or right edge when you need a vertical…from simpleonlineruler.com

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