Air Core Inductor Calculator

The following is a design tool based on Weaver's formula which calculates the inductance of an air core inductor.

L = (d2 * n2) / (18d + 40l)


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

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


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