Website shows ruler in real size based on your monitor size. HO scale ruler, each tick is exactly 3.5mm per NMRA standards (NMRA) standard 'S-1.2 General Standard Scales' defines HO scale as 3.5 mm (0.1378 in) representing 1 real foot (304.8 mm) a ratio of 1:87.0857142, usually rounded to 1:87.1. It's powered with JavaScript and HTML5.Ī handy and accurate on-screen online ruler in inches and centimeters/ millimeters. A to-scale model of a standard 30cm ruler. I created this page to measure your screen resolution and produce an online ruler of actual size. Turn your screen into a ruler online Measure actual sizes with Get Ruler in centimeters, inches or pixels. This website measures the size of your screen and creates the image of a ruler that is the actual size. This is an online virtual ruler, it could be adjusted to an actual size, and has both metric and imperial scale units, before you use it, please set the pixels per inch . Teachers love the fact that our sheet has. The rulers are clearly marked in one millimeter increments for the student to use in simple in classroom lessons or homework. You can use a virtual on-screen online ruler to measure the actual size of a small object in inches or centimeters if you dont have a real ruler at hand. This small one inch wide ruler will measure up to 250 millimeters. 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. Simple Millimeter Ruler is a free printable ruler to measure the smallest unit of length in the metric system. Enter visible screen width below to calibrate ruler.

Actual size image of Online Ruler (cm/mm) . Calibration required once Do calibration with non incognito/private window to save data. This is an online scale ruler that can be adjusted to an actual size, 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.

Real life size milimeter ruler