Joules (J) to Volts (V) calculator and how to calculate

Convert energy in joules (J) to electrical voltage in volts (V)

The voltage *V*, in Volts (V) across an electrical circuit is calculated by dividing the Energy *E*, in Joules (J) by the Charge *Q* in coulomb (C).

*V*_{(V)} = *E*_{(J)} /* Q*_{(C)}

Therefore;

Volt = joule / coulomb

Or

V = J / C

**Example
**

If the energy consumption in an electrical circuit is 90 Joules and the charge flowing through the circuit is 3 coulombs, calculate the voltage supply across the circuit.

*Solution*

*V* = 90J / 3C = 30V