Enter the electron charge (C) and the accelerating voltage (volts) into the calculator to determine the X-Ray Energy. 

X-Ray Energy Formula

The following equation is used to calculate the X-Ray Energy. 

Ex = ec * V


  • Where Ex is the X-Ray Energy (J)
  • ec is the electron charge (1.60217662 * 10^-19 C) 
  • V is the accelerating voltage (volts) 

To calculate the x-ray energy, multiply the acceleration voltage by the electron charge.

How to Calculate X-Ray Energy?

The following two example problems outline the steps and information needed in order to calculate the X-Ray Energy.

Example Problem #1:

  1. First, determine the electron charge (C). In this example, the electron charge (C) is measured to be 13.
  2. Next, determine the accelerating voltage (volts). For this problem, the accelerating voltage (volts) is calculated to be 5.
  3. Finally, calculate the X-Ray Energy using the formula above: 

Ex = ec * V

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

Ex = 13 * 5 = 65 (J)

Example Problem #2: 

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

electron charge (C) = 74

accelerating voltage (volts) = 3

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

Ex = 74 * 3 = 222 (J)