Coax Cable Calculator Impedance Inductance Capacitance


Calculating the impedance, inductance, and capacitance of coaxial cables is essential in various electronic applications. Whether you’re an engineer, hobbyist, or student, understanding these parameters is crucial for designing efficient circuits and systems. In this article, we’ll delve into the process of using a coax cable calculator to determine these values accurately.

How to Use

To utilize the coax cable calculator effectively, follow these steps:

  1. Input the required parameters such as the cable’s dimensions, dielectric constant, and frequency.
  2. Click on the “Calculate” button to obtain the impedance, inductance, and capacitance values.
  3. Analyze the results to make informed decisions regarding your electronic design.


The calculation of coaxial cable parameters involves several intricate formulas. One of the fundamental formulas used is:


  • Z is the impedance.
  • R is the resistance per unit length.
  • L is the inductance per unit length.
  • G is the conductance per unit length.
  • C is the capacitance per unit length.
  • ω is the angular frequency.

Example Solve

Let’s consider an example where we have a coaxial cable with the following parameters:

  • Resistance per unit length (R): 0.1 ohms/m
  • Inductance per unit length (L): 0.2 μH/m
  • Conductance per unit length (G): 0.01 S/m
  • Capacitance per unit length (C): 50 pF/m
  • Operating frequency (f): 1 GHz

By plugging these values into the formula, we can calculate the impedance of the coaxial cable.

Upon computation, we find the impedance to be approximately Z=16.38+j5.53 ohms.


Q: How accurate are the calculations provided by the coax cable calculator?
A: The calculations are highly accurate, considering the parameters provided and the underlying mathematical models.

Q: Can the calculator handle different units of measurement?
A: Yes, the calculator is designed to accept various units such as ohms, henries, farads, and frequencies in hertz or gigahertz.

Q: Is there any limit to the frequency range for which the calculator can provide accurate results?
A: The calculator can handle a wide range of frequencies, but for extremely high frequencies, factors like skin effect and dielectric losses may need to be considered for precise results.


The coax cable calculator simplifies the complex task of determining impedance, inductance, and capacitance for coaxial cables. By leveraging accurate formulas and user-friendly interfaces, engineers and enthusiasts can optimize their electronic designs efficiently.

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