revolution/second [r/s] Unit Converter

Definition of revolution/second [r/s] unit

Revolution per second (rev/s) is a unit of angular velocity equal to one complete rotation, or 360 degrees, performed in one second. It corresponds to 2π radians per second and describes rotational speed with direction omitted.

History of revolution/second [r/s] unit

The idea of measuring rotation by completed turns is ancient, arising from observations of wheels, gears, astronomical bodies, and mechanical cycles. As clocks, machinery, and scientific instruments developed, engineers needed ways to compare rotational rates. Revolutions per minute became common in industry, while revolution per second offered a convenient equivalent for faster motion and frequency-related calculations. Modern physics generally expresses angular velocity in radians per second, the SI unit, yet rev/s remains widely understood. The unit is especially useful because one revolution directly represents a full 360-degree cycle.

Applications of revolution/second [r/s] unit

Revolution per second is used to report the speed of rapidly rotating shafts, turbines, drills, centrifuges, motors, and laboratory rotors. For example, a rotor turning at 5 rev/s completes five rotations each second and has an angular speed of 10π radians per second. Engineers also use it when converting rotational frequency into angular velocity in control, robotics, and physics calculations.

Complete list of revolution/second [r/s] unit conversion