Enter the maximum kinetic energy (J) and the electron charge ( C) into the Calculator. The calculator will evaluate the Stopping Voltage. 

Stopping Voltage Formula

SV = KE/e


  • SV is the Stopping Voltage (volts)
  • KE is the maximum kinetic energy (J)
  • e is the electron charge ( C)

To calculate Stopping Voltage, divide the maximum kinetic energy by the electron charge.

How to Calculate Stopping Voltage?

The following steps outline how to calculate the Stopping Voltage.

  1. First, determine the maximum kinetic energy (J). 
  2. Next, determine the electron charge ( C). 
  3. Next, gather the formula from above = SV = KE/e.
  4. Finally, calculate the Stopping Voltage.
  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.

maximum kinetic energy (J) = 45

electron charge ( C) = 20