Coulombs to Joules Calculator

Calculate energy in Joules from electrical charge and voltage.

Coulombs to Joules Conversion

Coulomb (C)

A coulomb is the SI unit of electric charge, representing:

  • The charge transported by a one-ampere current in one second
  • Approximately 6.242 × 1018 elementary charges
  • The basic unit for measuring electric charge quantity

Joule (J)

A joule is the SI unit of energy, work, and heat. It can be understood as:

  • The energy transferred when applying a force of one newton over one meter
  • The energy dissipated when one ampere passes through a one-ohm resistor for one second
  • The work done to produce one watt of power for one second

Volt (V)

A volt is the SI unit of electric potential difference or electromotive force. It represents:

  • The energy per unit charge
  • One joule of energy per coulomb of charge
  • The potential difference that would drive one ampere of current against one ohm resistance

Formula

J = V × C
J = Energy (joules)
V = Voltage (volts)
C = Charge (coulombs)

Practical Example

Given:

  • Voltage = 3 volts
  • Charge = 4 coulombs

Solution:

J = 3 V × 4 C = 12 J

Coulombs to Joules Conversion Table

Charge (Coulombs)Voltage (Volts)Energy (Joules)
4 C3 V12 J
8 C3 V24 J
12 C3 V36 J
16 C3 V48 J
20 C3 V60 J
24 C3 V72 J
28 C3 V84 J
32 C3 V96 J
36 C3 V108 J
40 C3 V120 J

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