To measure eighths on a ruler, simply look at each 2 1/16th-inch tick mark. Rigorously align the 0-centimeter mark on the edge of the item you wish to measure. Alternatively, you can use the inch side of your ruler to measure an object and Công ty xây dựng convert it to centimeters. Now, locate the tip of the article and see which centimeter and millimeter tick mark it reaches. The next chart will describe the millimeter and centimeter equivalents of inch fractions.