Joules to Volts calculation formula
V(V) = E(J) / Q(C)
The voltage V in volts (V) is equal to the energy E in joules (J), divided by the electric charge Q in coulombs (C).
So,
V = J / C
volt = joule / coulomb
For example:
Energy (E) = 45J
Charge (Q) = 3C
Voltage (V) = 45J / 3C = 15V
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