# Coil Resonant Frequency Calculator

Calculate the resonant frequency of a Tesla coil with the Coil Resonant Frequency Calculator and learn on the go with the integrated live example

The Coil Resonant Frequency Calculator combines the features of the Coil Capacitance Calculator, the Coil Inductance Calculator, and the Resonant Frequency Calculator to calculate the resonant frequency of an air-core single-layer solenoid coil, or Tesla coil, from the coil length, diameter and number of turns. Visit those calculator pages for more details on how to calculate each factor.

The actual measured frequency in the real world may be slightly different than the calculated value because factors like the wire insulation, the coil frame, objects in the environment around the coil etc. all add to the burden or parasitic capacitance of the coil, which has the effect of bringing the resonant frequency of the coil down.

### Using the Coil Resonant Frequency Calculator

Select the value that you would like to calculate

**Coil Length:** Enter the coil length, measured as depicted in the diagram above

**Coil Diameter:** Enter the coil diameter, measured as depicted in the diagram above

**Number Of Turns:** Enter the number of turns

**Conductor Length:** The conductor length is shown for your convenience but has no bearing on the calculation

**Selecting units:** You can choose your preferred units of measurement through selecting the units cells and clicking the downwards pointing arrow to display a list of available options

**Learn As You Go:** This feature displays a live example of how to calculate the resonant frequency of a coil using the figures that you enter

*Reference: ARRL – The Radio Amateur’s Handbook*