Calculate output power from input power and efficiency, torque and speed, voltage-current power factor, or pump shaft input power from hydraulic flow and pressure rise.

Steady power magnitudes. Presets are illustrative assumptions, not equipment ratings. Three-phase AC assumes a balanced sinusoidal load.

Output Power Formula

The following formula is used to calculate the Output Power. 

Po = Pi ร— E / 100
  • Where Po is the Output Power (watts)
  • Pi is the input power (watts) 
  • E is the efficiency (%) 

To calculate output power, multiply input power by efficiency expressed as a decimal (divide a percentage by 100). The pump mode instead calculates required shaft input as fluid power divided by pump efficiency.

How to Calculate Output Power?

The following two example problems outline how to calculate the Output Power.

Example Problem #1:

  1. First, determine the input power (watts). In this example, the input power (watts) is measured to be 502.
  2. Next, determine the efficiency (%). For this problem, the efficiency (%) is calculated to be 20.
  3. Finally, calculate the Output Power using the formula above: 

Po = Pi * E/100

Inserting the values from above and solving the equation with the imputed values gives: 

Po = 502 * 20/100 = 100.4 (watts)

Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

input power (watts) = 100

efficiency (%) = 20

Entering these values into the formula or calculator above gives us 

Po = 100 * 20/100 = 20 (watts)