Calculate voltage, charge, or energy from the other two values using E = V × Q with volts, coulombs, and joules in any unit, plus unit conversion.

Energy Charge Voltage Calculator

Enter any 2 values to calculate the missing variable

Voltage from Energy and Charge Formula

The following formula is used to calculate the Voltage from Energy and Charge. 

V = E / q
  • Where V is the voltage (volts)
  • E is the energy (joules, J) 
  • q is the charge (C) 

To calculate the voltage from energy and charge, divide the energy by the charge.

How to Calculate Voltage from Energy and Charge?

The following two example problems outline how to calculate the Voltage from Energy and Charge.

Example Problem #1:

  1. First, determine the energy (J). In this example, the energy is measured to be 43 J.
  2. Next, determine the charge (C). For this problem, the charge (C) is calculated to be 3.
  3. Finally, calculate the Voltage from Energy and Charge using the formula above: 

V = E / q

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

V = 43 / 3 = 14.33 (volts)

Example Problem #2: 

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

energy (J) = 57

charge (C) = 7

Entering these values into the formula above gives : 

V = 57 / 7 = 8.14 (volts)