Volts to Joules (Energy) Calculator
Calculate electrical energy (E) given voltage (V) and charge (Q).
Formula Used
Where: E = Energy in Joules (J), V = Voltage in Volts (V), Q = Charge in Coulombs (C).
Volts to Joules Relationship
Voltage alone cannot be directly converted to joules. This is because volts and joules represent different physical quantities:
- Volts (V) measure electric potential difference or voltage
- Joules (J) measure energy
To calculate the energy in joules from voltage, we need an additional parameter: charge in coulombs (C).
The Conversion Formula
The fundamental formula that relates volts to joules is:
E = V× Q
Where:
- E is the energy in joules (J)
- V is the voltage in volts (V)
- Q is the electric charge in coulombs (C)
This formula is derived from the definition of voltage as energy per unit charge.
Example 1: Household Battery
A standard AA battery has a voltage of 1.5V. If it supplies a charge of 2,000 coulombs throughout its lifetime:
E = 1.5 V × 2,000 C = 3,000 J
This means the battery can deliver 3,000 joules of energy before being consumed.
