Most standard rulers are 30 centimeters long, which makes 1 centimeter equal to one-thirtieth of the length of a standard 12-inch, or 30-centimeter, ruler.How do you calculate ruler measurement?
Measuring an Object Using a Ruler Measure with a ruler or tape measure. Place the zero end of your rule at the end of your object. Move to the opposite side of the object you are measuring. Use a metric or decimal rule with a metric ruler. Use a tape measure to measure between objects, for instance, walls.What is the exact size of a ruler?
A typical ruler measures up to 12 inches, and is equivalent to 30.48 centimeters. This is also equivalent to 1 foot. Each inch on a ruler has markings in between that are a fraction of an inch.What are the measurements of a ruler?
A ruler is one of the most common measuring instruments. The ruler, shows both imperial and metric measurements. One side is 12 "inches" long (imperial), while the other is 30 centimeters (metric). The yardstick (3 feet long) or meter stick (100 cm or 1000 mm long) are two longer rulers.