What unit is a metric rule graduated in?

A metric rule is specifically designed to measure lengths using the metric system, which is based on units such as centimeters and millimeters. The correct choice of millimeters is particularly important in engineering and technical fields, including welding, where precision is crucial.

When using a metric ruler, measurements can be made in either centimeters or millimeters, with each centimeter being equivalent to ten millimeters. However, the standard graduation often includes more divisions for finer measurements, and millimeters are commonly preferred for tasks that require higher precision.

While inches and feet are units of the imperial measuring system, they are not part of the metric system and are therefore not applicable here. When tasked with making detailed measurements in a technical context, millimeters are essential for achieving the required accuracy.