Enter the capacitance and voltage into the calculator to determine the energy. This calculator can also evaluate any of the variables given the others are known.

Farads To Joules Formula

The following formula is used to calculate the energy in Joules from capacitance in Farads.

E = 0.5 * C * V^2


  • E is the energy (Joules)
  • C is the capacitance (Farads)
  • V is the voltage (Volts)

To calculate the energy in Joules, multiply the capacitance in Farads by the square of the voltage, then multiply the result by 0.5.

What is a Farads To Joules?

Farads to Joules is a conversion process used in physics to convert the measurement of electrical capacitance (Farads) to the measurement of energy (Joules). This conversion is based on the formula that the energy stored in a capacitor (measured in Joules) is equal to half the product of the capacitance (in Farads) and the square of the voltage. Therefore, knowing the capacitance and voltage allows one to calculate the energy in Joules.

How to Calculate Farads To Joules?

The following steps outline how to calculate the Farads To Joules using the formula: E = 0.5 * C * V^2

  1. First, determine the capacitance (C) in Farads.
  2. Next, determine the voltage (V) in Volts.
  3. Next, square the voltage (V^2).
  4. Multiply the capacitance (C) by the squared voltage (V^2).
  5. Multiply the result by 0.5.
  6. Finally, calculate the energy (E) in Joules.
  7. 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.

capacitance (C) in Farads = 10

voltage (V) in Volts = 5