Revolutions per hour is the number of turns in one minute. It is a unit of rotational speed. It is also used in frequency of rotation around a fixed axis. According to the International System of Units (SI), rpm is not a unit. This is because the word revolution is a semantic annotation rather than a unit. On many kinds of disc recording media, the rotational speed of the medium under the read head is a standard given in rpm
Standard Units | |
---|---|
Cycle/second | {{cyclepersecond}} |
Degree/hour | {{degreeperhour}} |
Degree/minute | {{degreeperminute}} |
Degree/second | {{degreepersecond}} |
Gigahertz | {{gigahertz}} |
Hertz | {{hertz}} |
Kilohertz | {{kilohertz}} |
Megahertz | {{megahertz}} |
Millihertz | {{millihertz}} |
Radian/hour | {{radianperhour}} |
Radian/minute | {{radianperminute}} |
Radian/second | {{radianpersecond}} |
Revolution/hour | {{revolutionperhour}} |
Revolution/second | {{revolutionpersecond}} |
RPM | {{rpm}} |
Terrahertz | {{terrahertz}} |