mm

A millimeter (mm) measures length in the metric system. One millimeter equals one-thousandth of a meter. People use millimeters to measure small distances with precision. Engineers, machinists, and designers often rely on millimeters when accuracy matters. For example, they measure the thickness of metal, the width of wires, or the spacing between components. A standard ruler usually includes millimeter markings for easy reference. In construction and manufacturing, teams use millimeters to ensure tight tolerances. Scientists also prefer millimeters when recording fine measurements in experiments. The metric system, including millimeters, keeps calculations simple by using base-ten conversions. Tools like calipers and micrometers often measure in millimeters to give exact readings. Consistent use of millimeters improves accuracy across industries worldwide.