Enter the full load current (amps) and the percentage of full load current (%) into the calculator to determine the No Load Current. 

No Load Current Formula

The following formula is used to calculate the No Load Current. 

In-L = FLC * R/100

  • Where In-L is the No Load Current (amps)
  • FLC is the full load current (amps) 
  • R is the percentage of full load current (%) 
    • star motor = 10%
    • delta motor = 30%
    • dc motor = 25%

How to Calculate No Load Current?

The following two example problems outline how to calculate the No Load Current.

Example Problem #1:

  1. First, determine the full load current (amps). In this example, the full load current (amps) is measured to be 450.
  2. Next, determine the percentage of full load current (%). For this problem, the percentage of full load current (%) is calculated to be 52.
  3. Finally, calculate the No Load Current using the formula above: 

In-L = FLC * R/100

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

In-L =450* 52/100 = 234 (amps)


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:

full load current (amps) = 120

percentage of full load current (%) = 42

Entering these values into the formula above gives : 

In-L = 120* 42/100 = 50.4 (amps)