Motor Power Calculator


In the world of engineering and machinery, calculating motor power is crucial for determining the capacity and efficiency of various systems. Whether it’s for industrial machinery, vehicles, or household appliances, understanding motor power requirements is essential for proper functionality and safety.

How to Use:

To utilize the motor power calculator effectively, input the necessary parameters such as torque, speed, and efficiency into the respective fields. Then, simply click the “Calculate” button to obtain the accurate result.


The formula for calculating motor power is:


  • P = Power (in horsepower)
  • T = Torque (in pound-feet)
  • ω = Angular speed (in revolutions per minute)
  • η = Efficiency (in decimal)

Example Solve:

Let’s say we have a system with a torque of 200 pound-feet, an angular speed of 300 revolutions per minute, and an efficiency of 0.85. Plugging these values into the formula:


Q: What units should I use for torque and angular speed?

A: Torque should be in pound-feet, and angular speed should be in revolutions per minute (RPM).

Q: Why is efficiency important in motor power calculations?

A: Efficiency accounts for losses in the motor system, providing a more accurate representation of the power required.

Q: Can this calculator be used for both AC and DC motors?

A: Yes, the calculator works for both AC and DC motors as long as the input parameters are correct.


The motor power calculator simplifies the process of determining the power requirements for various mechanical systems. By accurately estimating power needs, engineers can optimize performance and ensure the efficiency of motor-driven applications.

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