Toroid Inductor Online Calculator

Below is online calculator for calculating inductance or number of turns required to make iron core and ferrite toroid inductor. There are two calculators- the first one uses the inductance index(inductance factor) and the other uses the geometry of the toroid.

A. Using Inductance Factor $A_L$

Calculate N:
L: mH µH nH
A_L: mH/1000t² µH/100t² nH/t²

Result:
N:

Calculate L:
A_L: mH/1000t² µH/100t² nH/t²
N:

Result:
L:

Iron Powered Toroid Inductor 

The formula for Iron Powered Toroid Inductor used above is given below.

Inductance(L):  $L_ = \frac{A_L N^2}{10,000} [\mu H]$

Number of Turns(N):  $N = 100 \sqrt{\frac{L_{\mu H}}{A_L}}$

Geometry based Toroid Inductor Online Calculator
Calculate N: L: mH µH nH D:cm d:cm h:cm µi: n: Result: N: Ae:cm2 le:cm Calculate L: D:cm d:cm h:cm µi: N: n: Result: L: Ae:cm2 le:cm