Teslatool

All-round tesla coil sizing calculator. There are many ways to approximate a coil inductance depending on the shape and size of the coil. Some equations are better to calculate flat coils, some better for high one-layer coils. As such, there are many different formulas available with varying levels of complexity. I used formulas from Wheeler, Nagoaka/Lundin and Medhurst.

Calculator

Primary coil

Inner diameter [mm]

Spacing between windings [mm]

Wire diameter [mm]

Number of windings

Winding angle [°]

Height above secondary coil (optional) [mm]

Primary coil outer diameter [mm]

Coil height [mm]

Wire length [mm]

Inductivity [µH]

Secondary coil

Coil diameter [mm]

Spacing between windings [mm]

Enamelled wire diameter [mm]

Winding length [mm]

Torus thickness [mm] (0=sphere)

Outer diameter of torus [mm]

Number of windings

Aspect ratio

Inductivity [mH]

Wire length [m]

Coil self capacity [pF]

Torus capacity [pF]

Resonance frequency without torus [kHz]

Resonance frequency with torus [kHz]

Needed primary capacitance [nF]

Parameter adjustment

Available primary capacitance [nF]

Resulting primary resonance frequency [kHz]