Enter the displacement current density (amps/mm^2) and the area of the capacitor (mm^2) into the calculator to determine the Displacement Current. 

Displacement Current Formula

The following formula is used to calculate the Displacement Current. 

Id = Jd * S

  • Where Id is the Displacement Current (amps)
  • Jd is the displacement current density (amps/mm^2) 
  • S is the area of the capacitor (mm^2) 

How to Calculate Displacement Current?

The following two example problems outline how to calculate the Displacement Current.

Example Problem #1:

  1. First, determine the displacement current density (amps/mm^2). In this example, the displacement current density (amps/mm^2) is measured to be 20.
  2. Next, determine the area of the capacitor (mm^2). For this problem, the area of the capacitor (mm^2) is calculated to be 31.
  3. Finally, calculate the Displacement Current using the formula above: 

Id = Jd * S

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

Id = 20*31 = 620 (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:

displacement current density (amps/mm^2) = 5

area of the capacitor (mm^2) = 105

Entering these values into the formula or calculator above gives us:: 

Id = 5 * 105 = 525 (amps)