Enter the energy in Joules and the electric potential or voltage in Volts into the calculator to determine the electric charge in Coulombs. This calculator can also evaluate any of the variables given the others are known.

Joules To Coulombs Formula

The following formula is used to calculate the conversion from Joules to Coulombs.

C = J / V

Variables:

  • C is the electric charge in Coulombs (C)
  • J is the energy in Joules (J)
  • V is the electric potential or voltage in Volts (V)

To calculate the conversion from Joules to Coulombs, divide the energy in Joules by the electric potential or voltage in Volts. The result is the electric charge in Coulombs.

What is Joules To Coulombs?

Joules to Coulombs is not a direct conversion as they are two different units measuring different physical quantities. Joules is a unit of energy in the International System of Units (SI), while Coulombs is a unit of electric charge. However, they can be related through the concept of electric potential or voltage, where one Joule of energy is equivalent to one Coulomb of charge moved through an electric potential of one volt. Therefore, to convert Joules to Coulombs, you would need to know the voltage involved.

How to Calculate Joules To Coulombs?

The following steps outline how to calculate the Joules To Coulombs using the formula C = J / V.


  1. First, determine the energy in Joules (J).
  2. Next, determine the electric potential or voltage in Volts (V).
  3. Next, gather the formula from above = C = J / V.
  4. Finally, calculate the electric charge in Coulombs (C).
  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.

energy in Joules (J) = 150

electric potential or voltage in Volts (V) = 10