Measuring Lines In Cm. Online Ruler. on-screen measuring tool in inches/centimeters. Metric linear measurement worksheets for measuring centimeters and millimeters with a ruler.

Of course, there are tools around that can easily tell you how many pixels on the screen it is from one point to another.
Let's measure the green line below using both rectangles and a centimeter ruler.
Measurement Math Worksheets - Measuring Length. If you want to measure the actual size of a small object in inches or centimeters and you don't have a real ruler at hand, this virtual on-screen online ruler will help you. We know that the standard unit of length is 'Metre' which is written in short as 'm'.