Rotation Per Minute (RPM) is a unit of measurement that quantifies the number of complete rotations or cycles a rotating object completes within a minute. It measures the rotational speed or frequency of an object, typically expressed in revolutions per minute. The symbol for RPM is often written as "rpm" or sometimes just "RPM." In standard usage, particularly in engineering, mechanics, and related fields, RPM provides a crucial metric for evaluating the performance and efficiency of rotating machinery such as engines, motors, and turbines. Understanding RPM is essential in both practical and scientific contexts, as it helps in assessing the operational speed, power output, and overall functionality of various mechanical systems, ensuring optimal performance, safety, and energy efficiency.