Enter the torque in Newton-meters and the RPM into the calculator to determine the power in watts. This calculator helps in converting rotational mechanical energy into electrical power.

RPM to Watts Estimator

Enter RPM and choose a device to estimate power using a typical torque value.

Using a typical torque assumption for the selected device.
RPM ↔ Watts Conversion Table (Mechanical, Torque = 10 N·m)
RPM to Watts Watts to RPM
100 rpm = 104.720 watts100 watts = 95.493 rpm
200 rpm = 209.440 watts250 watts = 238.732 rpm
300 rpm = 314.159 watts500 watts = 477.465 rpm
500 rpm = 523.599 watts746 watts = 712.378 rpm
750 rpm = 785.398 watts750 watts = 716.197 rpm
1000 rpm = 1047.198 watts1000 watts = 954.930 rpm
1200 rpm = 1256.637 watts1500 watts = 1432.394 rpm
1500 rpm = 1570.796 watts2000 watts = 1909.859 rpm
1750 rpm = 1832.596 watts2500 watts = 2387.324 rpm
1800 rpm = 1884.956 watts3000 watts = 2864.789 rpm
2000 rpm = 2094.395 watts3728 watts = 3559.978 rpm
2400 rpm = 2513.274 watts4000 watts = 3819.719 rpm
2500 rpm = 2617.994 watts5000 watts = 4774.648 rpm
3000 rpm = 3141.593 watts5500 watts = 5252.113 rpm
3450 rpm = 3612.828 watts7457 watts = 7120.910 rpm
3600 rpm = 3769.911 watts7500 watts = 7161.972 rpm
5000 rpm = 5235.988 watts10000 watts = 9549.297 rpm
6000 rpm = 6283.185 watts11185 watts = 10680.888 rpm
8000 rpm = 8377.580 watts14914 watts = 14241.821 rpm
10000 rpm = 10471.976 watts20000 watts = 19098.593 rpm
Formulas: P = τ × 2π × RPM ÷ 60 and RPM = P × 60 ÷ (τ × 2π). Table assumes constant torque τ = 10 N·m.

RPM to Watts Formula

The following formula is used to calculate the power in watts from RPM and torque.

P (W) = τ * RPM * (2 * π) / 60

Variables:

  • P is the power in watts (W)
  • τ is the torque in Newton-meters (Nm)
  • RPM is the rotational speed in revolutions per minute

To calculate the power in watts, multiply the torque in Newton-meters by the rotational speed in RPM, then multiply by 2π and divide by 60 to convert to watts.

What is Power in Watts?

Power in watts is a unit of power that measures the rate at which energy is used or generated. In the context of rotational systems, it is a measure of how much work can be done by a rotating object over a certain period of time. It is a critical parameter in the design and analysis of motors, engines, and other mechanical systems that involve rotational motion.

How to Calculate Power in Watts from RPM?

The following steps outline how to calculate the power in watts from RPM and torque.


  1. First, determine the torque (τ) in Newton-meters.
  2. Next, determine the rotational speed (RPM).
  3. Use the formula P (W) = τ * RPM * (2 * π) / 60 to calculate the power in watts.
  4. Finally, enter the values into the calculator to verify the result.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Torque (τ) = 5 Newton-meters

RPM = 1500 revolutions per minute