Air core coil inductance

Online calculator for determining the inductance of an air-core coil. Enter a value for the diameter of the coil, its length, and the number of turns to get the desired result.

Calculator of air rod coil inductance

Formula:

Air Core Flat Spiral Inductance = ( ( (4.921)*N²(d1+d2)² ) / (15d1-7d2) ) * dimension

N = number of turns
d1=outer diameter
d2=inner diameter

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