Enter the relative dielectric constant, the wire separation, and the wire diameter into the calculator to determine the parallel wire capacitance.

Parallel Wire Capacitance Formula

The following equation is used to calculate the Parallel Wire Capacitance.

C = (120/SQRT(dc))*acosh(s/d)*3.333*SQRT(dc)

  • Where C is the parallel wire capacitance
  • dc is the relative dielectric constant
  • s is the wire separation (mm)
  • d is the diameter of the wires (mm)

What is a Parallel Wire Capacitance?


A parallel wire capacitor is a type of electrical capacitor, which is an electrical component that stores energy in the form of an electrostatic field. It consists of two parallel wires, often twisted around each other, which serve as its electrodes.

It is used to store alternating current (AC) or pulses (such as radio frequency pulses). It can be used to make filters and timing devices.

The basic concept behind the parallel wire capacitor is that the capacitor has two plates or electrodes which are charged by electric current flowing through a conductor. The electric charge then stays there until it is either discharged by connecting a load across the capacitor or upon being connected to another circuit.

How to Calculate Parallel Wire Capacitance?

Parallel Wire Capacitance (Cp) is the capacitance of two adjacent wires. It’s calculated by multiplying the area of separation between both wires by the distance between them. Cp = A x d

A is the area of separation between both wires and d is the distance between them.

For example, if two adjacent wires each have a width of 12mm and they’re separated by a distance of 6mm, then the Parallel Wire Capacitance would be: Cp = π x (12 mm) x (6 mm) = 216.23 pF