Enter the motor efficiency (%), the applied voltage (volts), power factor, and the current (amps) into the calculator to determine the Motor Absorbed Power.

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## Motor Absorbed Power Formula

The following formula is used to calculate the Motor Absorbed Power.

Pa = (n/100)* SQRT(3) * V * I * p.f.

- Where Pa is the Motor Absorbed Power (watts)
- n is the motor efficiency (%)
- V is the applied voltage (volts)
- I is the current (amps)
- p.f is the power factor

To calculate the motor absorbed power, multiply the efficiency by the square root of 3 times the voltage, current, and power factor.

## How to Calculate Motor Absorbed Power?

The following example problems outline how to calculate Motor Absorbed Power.

**Example Problem #1**

- First, determine the motor efficiency (%). In this example, the motor efficiency (%) is determined to be 45 .
- Next, determine the applied voltage (volts). For this problem, the applied voltage (volts) is measured to be 100 .
- Next, determine the current (amps). In this case, the current (amps) is found to be 54.
- Next, determine the power factor. For this problem, this is .50.
- Finally, calculate the Motor Absorbed Power using the formula above:

Pa = (n/100)* SQRT(3) * V * I * p.f.

Inserting the values from above and solving yields:

Pa = (45/100)* SQRT(3) * 100 * 54 * .50 = 2104.44 (watts)

**Example Problem #2**

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

motor efficiency (%) = 75

applied voltage (volts) = 500

current (amps) = 13

power factor = 3.4

Enter these given values into the calculator or above yields:

Pa = (75/100)* SQRT(3) * 500 * 13 * 3.4 = 28,708.742 ** **(watts)