Enter your Energy in Joules and Electric Charge in Coulombs into the Joules to Volts Calculator to find the resulting Voltage — because dividing energy by charge has never needed to be a mental math exercise.
Voltage
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To convert joules to volts, divide the energy in joules by the electric charge in coulombs using the formula: V = E/Q. For example, 1000 J divided by 10 C equals 100 V.
Energy is the ability to do work. It cannot be created or destroyed, only converted from one form to another according to the law of conservation of energy.
Electric charge is the property of matter that causes it to experience electrical forces. It's measured in coulombs (C) and can be positive or negative.
Voltage is the electric potential difference between two points. It represents the energy per unit charge and is measured in volts (V).
Yes, voltage can be negative. The sign indicates the direction of the potential difference relative to a reference point.
Using the formula V = E/Q, the voltage would be 1,000 J ÷ 10 C = 100 V.
If the charge is zero, the calculation becomes undefined (division by zero). You need a non-zero charge value to calculate voltage.