# Toroid Inductance Per Turn

Calculate the inductance per turn of a toroidal inductor with this easy-to-use online calculator.

Calculate the inductance per turn of a toroidal inductor using this convenient online electrical calculator. Toroidal inductors, characterized by their ring-shaped coils, are commonly employed when high inductance is needed at low frequencies. With a greater number of turns, toroid inductors can handle higher currents effectively.

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**Where:**

- L = Inductance
- N = number of turns
- μr = Relative permeability
- h = Core width
- d1 = Outer diameter
- d2 = Inner diameter
- A
_{e}= Effective core area - L
_{e}= Effective core length - V
_{e}= Effective core volume - B/I = Flux Density per Amp