The “**synchronous speed**” is the speed of the rotating magnetic field in an electric motor. Here is a simple synchronous speed calculator. Always remember that the synchronous speed and rated speed are two different parameters.

## Motor synchronous speed calculator

Number of poles | |

Supply frequency | hz |

## Result | |

Synchronous speed | RPM |

## How to use the synchronous speed calculator:

The above tool requires following data for calculation:

- The number of poles in the motor. (Mandatory)
- Supply frequency. (Mandatory)

After entering the required data, click on the “Calculate” button to find out the motor speed.

## Motor synchronous speed calculation

The following formula can be used for the calculation:

Where,

**f:**Supply frequency**P :**The number of poles

Therefore the synchronous speed of a motor is directly proportional to the supply frequency and inversely proportional to the number of poles in the motor.

## Standard synchronous speed table

No. of poles | Speed at 50Hz | Speed at 60Hz |
---|---|---|

2 | 3000 | 3600 |

4 | 1500 | 1800 |

6 | 1000 | 1200 |

8 | 750 | 900 |

10 | 600 | 720 |

12 | 500 | 600 |

16 | 375 | 450 |

24 | 250 | 300 |

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