How rpm converter works
This converter handles four ways to express rotational speed: revolutions per minute (RPM), radians per second (rad/s), hertz (Hz, meaning revolutions per second), and degrees per second (deg/s). It first converts the input to a common base unit of one revolution per second (1 Hz), then converts from that base into each of the other three units, so any combination works.
The conversion factors come from the definitions of a full turn and the time units: one revolution equals 2*pi radians or 360 degrees, and one minute equals 60 seconds. So 1 RPM = 1/60 Hz = (2*pi)/60 rad/s = 6 deg/s. The relationships are exact, and results are rounded to six decimal places (tiny values use scientific notation so they never collapse to zero).
RPM is the everyday unit for motors, engines, fans, drills, and turntables. Radians per second is the SI unit for angular velocity used in physics and engineering dynamics. Hertz (revolutions per second) is common for frequency and signal analysis. Degrees per second is convenient for robotics and gimbal control. Negative values are supported and represent reverse rotation.