How to read a ruler in inches? First of all, the lines on a standard inch ruler represent the fractions of an inch. Measurements on an Inch Ruler – Imperial System Therefore to convert millimeters until meters divide the number by 10 to get the correct value. One decimeter (1 dm) is one-tenth of a meter (1/10 m). One centimeter (1 cm) is one one-hundredth of a meter (1/100 m). So one millimeter (1 mm) is one one-thousandth of a meter (1/1000 m). Measure of Lengths – Conversion Table Millimeters (mm) to Centimeters (cm) to Decimeters (dm) to Meters (m) Conversion Chart mm Each line (1 mm) on a metric ruler represents. Ten lines or millimeters make up a centimeter. The bigger lines with the numbers make up the centimeters. On a metric ruler, each small mark (line) represents a mm. Most measurements in science class are done using a smaller scale then a meter which is either centimeter (cm) or millimeter (mm). In the metric system, the meter is the the standard unit for measurement. Reading Ruler Measurements – Metric System The 100 mm (10 cm), 200 mm (20 cm), 300 mm (30 cm), mm – millimeters, cm – centimeters rulers are using the metric system. Rulers can vary in length and systems, like the 6” and 12” (in or inches) ones, they are using imperial system.
These type of rulers have different names such as plastic or wooden rulers, architects scales, carpenters rules, seamstress tapes, measuring tapes and yardsticks. Like most rulers, they are mostly used in school for math, geometry and technical drawing, as well as the engineering and construction, carpentry, sewing, printing and many more other industries. These type of rulers for precision measurements may be have to be certified by NIST (National Institute Of Standards and Technology), to be more accurate, by the Dimensional Metrology Group of the US government. When it comes to accuracy the best material for a ruler has to be steel which is durable and rigid. In our case, the rulers you will find here are made to be printed on sheets of paper. Depending on the rigidity, lightweight or how often will be used, rulers can be made out of different materials such as metal, wood or plastic. A ruler, also known as “rule” or “line gauge”, is a thin rectangular measuring device that has straight edges and length measurement markings, equidistant & parallel lines with numbers, along the edge.