Motor Power Calculator – Free Online Tool

The Motor Power Calculator is a user-friendly tool designed to help you calculate the power of an electric motor using two different methods. Whether you have data on voltage, current, and efficiency or torque and angular speed, this calculator provides accurate results instantly.

Motor Power Formula

The power of a motor can be calculated using two formulas, depending on the available data:

1. Using Voltage, Current, and Efficiency:Power (Watts)=Voltage (V)×Current (A)×(Efficiency (%)100)Power (Watts)=Voltage (V)×Current (A)×(100Efficiency (%)​)This formula is ideal for electrical systems where voltage, current, and motor efficiency are known.
2. Using Torque and Angular Speed:Power (Watts)=Torque (Nm)×Angular Speed (rad/s)Power (Watts)=Torque (Nm)×Angular Speed (rad/s)This formula is used in mechanical systems where torque and angular speed are measurable.

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How to Calculate Motor Power? 2 Methods

Method 1: Voltage, Current, and Efficiency

1. Voltage (V): Enter the voltage supplied to the motor in volts.
2. Current (A): Enter the current drawn by the motor in amperes.
3. Efficiency (%): Enter the motor’s efficiency as a percentage.
4. The calculator will compute the power using the formula:Power=Voltage×Current×(Efficiency100)Power=Voltage×Current×(100Efficiency​)

Method 2: Torque and Angular Speed

1. Torque (Nm): Enter the torque produced by the motor in Newton-meters.
2. Angular Speed (rad/s): Enter the angular speed of the motor in radians per second.
3. The calculator will compute the power using the formula:Power=Torque×Angular SpeedPower=Torque×Angular Speed

How to Use This Calculator

1. Input Data:
   • For Method 1, fill in the Voltage, Current, and Efficiency fields.
   • For Method 2, fill in the Torque and Angular Speed fields.
   • You only need to use one method at a time.
2. Calculate:
   • Click the “Calculate Power” button to compute the motor power.
3. View Results:
   • The result will be displayed below the button in Watts.
4. Reset:
   • To perform a new calculation, simply clear the input fields and enter new values.

Why Use This Motor Power Calculator?

• Accurate Results: Uses precise formulas for reliable calculations.
• Dual Methods: Supports both electrical and mechanical inputs.
• User-Friendly: Clean, modern design with intuitive inputs.
• Responsive Design: Works seamlessly on all devices (desktop, tablet, mobile).

Example Calculations

Example 1: Using Voltage, Current, and Efficiency

• Voltage: 220 V
• Current: 5 A
• Efficiency: 90%
• Power = 220×5×(90100)=990 Watts220×5×(10090​)=990Watts

Example 2: Using Torque and Angular Speed

• Torque: 10 Nm
• Angular Speed: 50 rad/s
• Power = 10×50=500 Watts10×50=500Watts