# Revolutions per minute

**Revolutions per minute** (abbreviated **rpm**, **RPM**, **rev/min**, **r/min**, or with the notation min^{−1}) is the number of turns in one minute. It is a unit of rotational speed or the frequency of rotation around a fixed axis.

This article needs additional citations for verification. (July 2016) |

Revolutions per minute | |
---|---|

Unit of | Rotational speed |

Symbol | rpm or r/min |

Conversions | |

1 rpm in ... | ... is equal to ... |

SI angular speed | 2π/60 rad/s ≈ 0.1047198 rad/s |

SI frequency | 1/60 Hz ≈ 0.01666667 Hz |

SI derived rotational frequency | 1/60 s^{−1}, 1/60/s |

SI derived rotational speed | 1 min^{−1}, 1/min |