Enter the inductor current (amps) and the resistive load (ohms) into the Calculator. The calculator will evaluate the Voltage Spike. 

Voltage Spike Formula

VS = IC * RL


  • VS is the Voltage Spike (volts)
  • IC is the inductor current (amps)
  • RL is the resistive load (ohms)

To calculate Voltage Spike, multiply the inductor current by the resistive load.

How to Calculate Voltage Spike?

The following steps outline how to calculate the Voltage Spike.

  1. First, determine the inductor current (amps). 
  2. Next, determine the resistive load (ohms). 
  3. Next, gather the formula from above = VS = IC * RL.
  4. Finally, calculate the Voltage Spike.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

inductor current (amps) = 5

resistive load (ohms) = 10