Capacitor Energy and Charge Calculator 

Capacitor Energy and Charge Calculator

Calculate capacitor energy and charge with multiple unit options

Capacitor Energy & Charge Conversion

Learn how to calculate the energy stored in a capacitor and explore the principles of capacitive energy storage with practical examples.

What is a Capacitor?

A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by an insulating material, known as a dielectric. Capacitors are essential in various electronic circuits for energy storage and filtering.

Energy Storage Formulas

E = ½ × C × V²

Where:

  • E = Energy in Joules (J)
  • C = Capacitance in Farads (F)
  • V = Voltage in Volts (V)

Alternative Energy Formulas

E = ½ × Q² / C
E = ½ × Q × V

Where:

  • Q = Charge in Coulombs (C)

Charge Formula

Q = C × V

Example

Given:

  • Capacitance (C) = 300 μF = 3×10⁻⁴ F
  • Voltage (V) = 20 V

Energy Stored:

E = ½ × 3×10⁻⁴ F × (20 V)² = 60 mJ

Charge Stored:

Q = 3×10⁻⁴ F × 20 V = 6 mC

Author

  • Manish Kumar

    Manish holds a B.Tech in Electrical and Electronics Engineering (EEE) and an M.Tech in Power Systems, with over 10 years of experience in Metro Rail Systems, specializing in advanced rail infrastructure. He is also a NASM-certified fitness and nutrition coach with more than a decade of experience in weightlifting and fat loss coaching. With expertise in gym-based training, lifting techniques, and biomechanics, Manish combines his technical mindset with his passion for fitness.

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