Electric Motor Torque Calculator - Calculate motor power from torque and rpm

Torque (N·m): Torque (kN·m): Torque (lb·ft):

1. What is an Electric Motor Torque Calculator?

Definition: This calculator determines the torque and optional supply frequency of an electric motor based on power, speed, and number of poles.

Purpose: It aids in motor selection and performance analysis for engineering and industrial applications.

2. How Does the Calculator Work?

Torque is calculated using the main formula:

\[ T = \frac{60 \times P}{2 \times \pi \times \text{rpm}} \]

Where:

\( T \) — Torque (N·m)
\( P \) — Power (W)
\( \text{rpm} \) — Motor speed (revolutions per minute)

Supply frequency (if poles are provided) uses:

\[ f = \frac{\text{RPM} \times \text{Poles}}{120} \]

Explanation: Power is converted to watts, speed to RPM, and torque is computed in N·m, then converted to other units. Frequency is derived from RPM and poles.

3. Importance of Torque and Frequency

Details: Torque measures motor strength, while frequency relates to AC motor operation and grid compatibility.

4. Using the Calculator

Tips: Enter power (W, kW, hp) and speed (RPM, rad/s, Hz). Optionally add poles (≥2) for frequency (Hz, kHz, MHz). Torque outputs in N·m, kN·m, lb·ft.

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