# How to calculate Tesla coil secondary inductance with spacing between the wire.

I have built a secondary coil for a tesla coil, and I used 24 gauge wire spaced with fishing line the same diameter as the wire.

I have found formulas for no spacing, but not encountered how to figure out inductance with spacing between the wire.

How can I calculate the inductance of the tesla coil if the secondary winding is spaced out instead of being right next to each other?