### Tools

Inductance

Brooks coil

A Brooks coils has the shortest length of wire for a given inductance.

The radius, height and width of a brooks coil are all the same yielding a square section coil shown here.

$L⁡ ≅ 0.025391 c⁡ N⁡ 2 μ Η$

Where c is the width and height of the coil in cm and N is the number of turns.

 Coil Height/Width mm cm m inches ____________________ N (# of Turns) L (Inductance) uH H mH ____________________ Inner Radius Mean Radius Outer Radius