Air Core Inductor Coil Inductance Calculator

The following is a design tool which calculates the inductance of an air core inductor.

d (coil diameter in inches)	(inches)
l (coil length in inches)	(inches)
n (number of turns)
Inductance

Equations

L= (d^2 * n^2)/(18d+40l)

where:

L is inductance in micro Henrys,
d is coil diameter in inches,
l is coil length in inches, and
n is number of turns.