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Online calculators

Here you can see the formulas that the calculator uses.

Ferrite toroid calculation:

On-line ferrite ring core inductor calculator
ferrite toroid calculator
Select units:   AWG →   SWG → 

L – Required inductance
D1   – Outer diameter of ring
D2   – Inner diameter of ring
h   – Height of ring
µ – Relative magnetic permeability
d   – Diameter of wire    

N – Number of turns
Lw   – Required length of wire
Clear all

*Necessary for winding wire length with a reserve 10cm on the leads.

The calculator allows calculating only low-current coils, not a power supply chokes, see more...

You can determine the unknown permeability of the toroid core by the following calculator.

Another similar calculators:


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