Revolutions per minute (rpm)
Revolutions per minute (symbol: rpm or r/min) is a unit of rotational speed measuring the number of complete turns completed around a fixed axis in one minute. One rpm equals 1/60 of a hertz, or approximately 0.10472 radians per second. Widely used in mechanical engineering, automotive design, and manufacturing, rpm specifies the operating speeds of engines, electric motors, hard drives, and industrial centrifuges.
Frequency
- Nanohertz (nHz)16,666,666.67
- Microhertz (µHz)16,666.67
- Millihertz (mHz)16.67
- Hertz (Hz)0.02
- Kilohertz (kHz)1.67×10⁻⁵
- Megahertz (MHz)1.67×10⁻⁸
- Gigahertz (GHz)1.67×10⁻¹¹
- Terahertz (THz)1.67×10⁻¹⁴
Rotational speed
Angular velocity
- Radian per second (rad/s)0.1
- Radian per minute6.28
- Radian per hour376.99
- Radian per day9,047.79
- Degrees per second6
- Degrees per minute360
- Degrees per hour21,600
- Degrees per day518,400