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Free online ruler tool for measuring inches (in), centimeters (cm) and millimeters (mm)! The ruler scales to actual size based on your screen size. Every device has a different pixel density, so we auto-detect your device and scale the ruler accordingly.
This is a convenient online ruler that could be calibrated to actual size, measurements in cm, mm and inch, the upper half is the millimeter ruler and centimeter ruler, the lower half is an inch ruler.
Use this online ruler to measure objects in centimeters or millimeters with accurate scaling.
Online Ruler will help you to take actual size measurements of any object in mm, cm, and inches. Also, it's free and easy to use. Your current screen resolution is 800x600 pixels.
Press the "Start Fullscreen" button to enter fullscreen mode. Choose your preferred unit of measurement (cm or inches) using the settings button. Adjust the Pixel Density (PPI) to match your screen's specifications for accurate scaling.
iRuler.net are trying to detect size of your screen and then shows ruler in actual size. We are using machine learning to identifying your device, so each time you specifying correct size you are making our Ruler smarter.
Screen sized online ruler to measure anything virtually. Calibrated online and printable ruler for true to size on most resolution screens.
