Cylindrical Capacitor Calculator

A cylindrical capacitor is an essential concept in the realm of electrostatics and electrical engineering. These capacitors, typically consisting of two concentric cylindrical conductors, are widely used in various electrical and electronic devices. Their performance characteristics, such as capacitance, can be calculated using certain physical parameters like the permittivity of the material between the conductors, the length of the conductors, and their diameters. This article will explore the calculations and formulas related to cylindrical capacitors.

Cylindrical Capacitor Calculator
Cylindrical Capacitor Calculator Results
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Example Formula

The capacitance of a cylindrical capacitor can be calculated using the following formula:

C = (2πεL) / ln(b/a)


  1. C: capacitance of the capacitor (Farads)
  2. ε: permittivity of the material between the conductors (Farads per meter)
  3. L: length of the conductors (meters)
  4. b: outer conductor diameter (meters)
  5. a: inner conductor diameter (meters)
  6. ln: natural logarithm function

Who wrote/refined the formula

This formula was derived from the fundamental principles of electrostatics. The concept of capacitance and the related mathematical framework were developed during the 18th and 19th centuries by pioneering physicists such as Michael Faraday. While the specific individuals who first derived the formula for the capacitance of a cylindrical capacitor are not known, this formula is based on established principles in the field of electrostatics.

Real Life Application

Cylindrical capacitors find widespread usage in various electronic and electrical devices, including radio frequency transmission lines, power supply filters, and defibrillators. An understanding of their performance characteristics and associated calculations is vital for the design and manufacture of these devices.

Key individuals in the discipline

Michael Faraday (1791-1867), a British scientist, made significant contributions to the understanding of electrostatics and electromagnetism, including the concept of capacitance. His experiments and theoretical work laid the foundation for the development of electrical engineering.

Interesting Facts

  • Cylindrical capacitors are a key component in Tesla coils, devices that produce high-voltage, low-current, high-frequency alternating-current electricity.
  • The development of capacitors and the understanding of their characteristics have played a crucial role in the evolution of electronics, enabling the miniaturization of electronic devices and advancement of computing technology.
  • The fundamental principles underlying the operation of capacitors have remained largely unchanged for over a century, demonstrating the enduring value of these foundational concepts in physics.


Cylindrical capacitors are a pivotal element in the field of electronics and electrical engineering. The calculations associated with these components, grounded in the fundamental principles of physics, are essential for designing and understanding various electronic devices and systems. As we continue to push the boundaries of technology, the importance of understanding these basic principles will remain paramount.

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