PiliApp/ Check actual size/ Online Ruler (cm/mm) Actual size of Online Ruler (cm/mm) 30CM / 300mm width:300.0mm (11.81Inch)

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.

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.

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.

This virtual ruler that can be adjusted to true size, that can actually measure the actual length, the upper half is metric ruler (millimetre and centimetre), lower half is inches ruler, before you use this ruler, please set the pixels per inch to your own device. There are some ways to know the pixels per inch (PPI) to your devie.

A handy and accurate on-screen online ruler in inches and centimeters/millimeters. For any device.

Enter visible screen width below to calibrate ruler.

Check your wallet, use any paper money to be our compare object, then search "the width of your paper money" online, when you know the width, you can calibrate the ruler setting via adjuster.

View and measure with an actual size of online centimeter and millimeter (cm/mm) ruler. Perfect for on-screen measurements.

Turn your screen into a ruler online! Measure actual sizes with Get Ruler in centimeters, inches or pixels. No need for measuring tapes or rulers.