Here is a calculator that can be used to calculate torque from speed and speed from torque.

## Torque-speed calculator

Enter motor torque | |

Enter motor power | |

## Result | |

Motor speed | rpm |

## Speed-torque calculator

Enter the motor speed | RPM |

Enter the motor power | |

## Result | |

Torque in N.m | N.m |

Torque in lb.in | lb.in |

Torque in lb.ft | lb.ft |

## How to use the Speed-torque calculator:

The above speed-torque calculator requires the following data for calculation:

- Enter motor speed in RPM. (Mandatory)
- Enter power in hp or kW and choose the input unit
- After entering the required data, click on the “Calculate” button.

## How to use the torque-speed calculator:

The above torque-speed calculator requires the following data for calculation:

- Torque in Nm or lb.in and choose the input unit.
- Enter power in hp or kW and choose the input unit
- After entering the required data, click on the “Calculate” button.

## Formulae for speed calculation from torque

Calculation of motor speed when the power is in kilowatts:

Calculation of motor speed when the power is in horsepower:

## Formulae for torque calculation from speed

Calculation of motor torque when the power is in kilowatts:

Calculation of motor torque when the power is in horsepower:

Where,

**Torque**Torque in Newton-meter._{N.m}:**P**Power in kilowatts._{kW}:**Torque**Torque in Inch – pounds._{in.lb}:**P**Power in horsepower._{hp}:**Torque**Torque in Feet – pounds._{ft.lb}:

## Power-torque table @ 1500rpm

kW | HP | Torque(Nm) | Torque(lb.ft) | Torque(lb.ft) |

0.75 | 1 | 4.8 | 42.1 | 3.6 |

1.1 | 1.5 | 10.6 | 94.6 | 7.9 |

1.5 | 2 | 14.4 | 126.1 | 10.6 |

2.2 | 2.9 | 21.1 | 182.8 | 15.3 |

3 | 4 | 28.7 | 252.1 | 21.1 |

3.7 | 4.9 | 35.4 | 308.9 | 25.8 |

4 | 5.3 | 38.2 | 334.1 | 27.9 |

5 | 6.6 | 47.8 | 416 | 34.7 |

7.5 | 10 | 71.7 | 630.3 | 52.6 |

9.3 | 13 | 88.9 | 819.4 | 68.3 |

10 | 14 | 95.5 | 882.4 | 73.6 |

11 | 15 | 105.1 | 945.4 | 78.8 |

15 | 20 | 143.3 | 1260.5 | 105.1 |

18 | 24 | 171.9 | 1512.6 | 126.1 |

22 | 29 | 210.1 | 1827.8 | 152.4 |

30 | 40 | 286.5 | 2521 | 210.1 |

37 | 49 | 353.4 | 3088.3 | 257.4 |

45 | 59 | 429.8 | 3718.5 | 309.9 |

55 | 72 | 525.2 | 4537.8 | 378.2 |

75 | 99 | 716.2 | 6239.5 | 520 |

90 | 118 | 859.5 | 7437 | 619.8 |

110 | 144 | 1050.4 | 9075.6 | 756.3 |

130 | 170 | 1241.4 | 10714.3 | 892.9 |

150 | 197 | 1432.4 | 12416 | 1034.7 |

175 | 229 | 1671.1 | 14432.8 | 1202.8 |

200 | 262 | 1909.8 | 16512.6 | 1376.1 |

225 | 295 | 2148.6 | 18592.4 | 1549.4 |

250 | 327 | 2387.3 | 20609.2 | 1717.5 |

275 | 360 | 2626 | 22689 | 1890.8 |

300 | 393 | 2864.7 | 24768.9 | 2064.1 |

350 | 458 | 3342.2 | 28865.5 | 2405.5 |

400 | 523 | 3819.6 | 32962.1 | 2746.8 |

450 | 589 | 4297.1 | 37121.8 | 3093.5 |

550 | 719 | 5252 | 45315 | 3776.2 |

600 | 785 | 5729.4 | 49474.7 | 4122.9 |

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