Straight Wire Inductor Calculator

Straight Wire Inductor

A straight wire inductor is a type of conductor that is frequently used in electrical circuits to produce inductance and magnetic fields.
It functions as a basic type of inductor in a variety of electrical circuits and can be as simple as a single straight wire or as many wires stacked parallel to one another.

When current flows through a straight wire inductor, its main function is to store and release energy in the form of a magnetic field.
In circuits, it produces inductance, which resists variations in current flow and aids in controlling voltage levels, removing noise, and stabilizing electrical signals.

Understanding Straight line inductor:

A straight wire possesses inductive properties, albeit with limited efficiency compared to a coiled wire. Referred to as self-inductance, it denotes the wire’s capacity to store energy within its magnetic field. Determinants of a straight wire’s self-inductance include its length, diameter, and the medium surrounding it. Longer wires generally exhibit greater inductance, while thicker diameters contribute to higher inductance compared to thinner ones. Additionally, the surrounding medium influences the wire’s inductance, with variations observed between air and ferromagnetic surroundings.

Although capable of inductive behavior, the inductance of a straight wire is notably lower than that of a coiled wire due to the less concentrated magnetic field. Consequently, coils are preferred in applications requiring higher inductance. It’s important to recognize that while inductance is commonly associated with wire coils, straight wires also display inductive characteristics, albeit typically at lower levels compared to coils.

Here are some key points to summarize:

A linear wire possesses the capability to function as an inductor, storing energy within its magnetic field. The inductance of such a wire hinges upon factors including its length, diameter, and the environment in which it is situated. Longer wires exhibit higher inductance levels. Additionally, the thickness of the wire impacts its inductance, with thicker wires manifesting greater inductance. Moreover, the surrounding medium can influence the wire’s inductance. Comparatively, the inductance of a linear wire tends to be significantly lower than that of a wire coil. Wire coils find extensive use in scenarios necessitating elevated inductance levels, whereas linear wires suffice for applications where lower inductance suffices.


  • Filter Circuits
  • Power Supplies
  • RF Circuits
  • Electronic Components
  • Structural Integrity

To find the inductance of a straight wire conductor, use this online calculator. The calculator only needs to know the wire’s length and diameter to determine the associated inductance value.

Note : Don’t end with comma ( , )

Length (a)
Diameter (d)


\[L = 0.00508 * a * \left(log\left(2*\frac{a}{d}\right)-0.75\right)\]


  • L = Inductance
  • a,d = Length & Diameter of the wire

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