Enter the number of turns, permeability, cross-sectional area, and length into the calculator to determine the inductance of the via coil. This calculator can also evaluate any of the variables given the others are known.

Via Inductance Formula

The following formula is used to calculate the inductance of a coil.

L = (N^2 * μ * A) / l

Variables:

  • L is the inductance of the coil (Henries) N is the number of turns in the coil μ is the permeability of the core material (Henries per meter) A is the cross-sectional area of the coil (square meters) l is the length of the coil (meters)

To calculate the inductance of a coil, square the number of turns in the coil and multiply it by the permeability of the core material and the cross-sectional area of the coil. Then, divide this result by the length of the coil.

What is a Via Inductance?

Via inductance refers to the inductive properties of a via, which is a hole in a printed circuit board (PCB) that allows electrical connection between different layers of the board. The inductance is caused by the magnetic field generated when current flows through the via. This can cause signal distortion, especially at high frequencies, and is therefore an important consideration in high-speed circuit design.

How to Calculate Via Inductance?

The following steps outline how to calculate the Via Inductance using the given formula:


  1. First, determine the number of turns in the coil (N).
  2. Next, determine the permeability of the core material (μ).
  3. Next, determine the cross-sectional area of the coil (A) in square meters.
  4. Next, determine the length of the coil (l) in meters.
  5. Finally, use the formula L = (N^2 * μ * A) / l to calculate the Via Inductance (L).

Example Problem:

Use the following variables as an example problem to test your knowledge:

Number of turns in the coil (N) = 5

Permeability of the core material (μ) = 0.02 Henries per meter

Cross-sectional area of the coil (A) = 0.1 square meters

Length of the coil (l) = 0.5 meters