For the ruler to display correctly (i.e., in proportion to the actual physical size), it must be calibrated. You can calibrate it in one of the following two ways: 📱 💻 📺 Set screen diagonal. This is …

Actual size online ruler: the most accurate size ruler on the web. Vertical virtual ruler : measure items in a vertical direction. Virtual ruler on your image : practice how to use a ruler.

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.

Check actual size / Online Ruler (cm/mm) Actual size of Online Ruler (cm/mm) 30CM / 300mm. width:300.0mm (11.81Inch) {as_size} / {as_monitor} full screen drag it ...

A free online ruler tool that works on any device, and automatically scales based on your screen size and DPI. Measure with confidence for free, anytime, anywhere!

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 …

Our application creates a virtual ruler equivalent to a real ruler in inches and centimeters on your display. Make sure the application correctly detected the size of your device’s screen. If the …