Colpitts oscillator calculator

Coil inductance and resonant frequency calculator 

This Colpitts calculator will compute the values of
Ctop and Cbot, providing you supply the oscillator
frequency, inductance value of the coil (L), and beta.
The feedback ratio is usually 1:10, therefore beta is 0.1    
\( f_0 = \frac{1}{2 \cdot \pi \cdot \sqrt{L \cdot \left( \frac{C_{\text{top}} \cdot C_{\text{bot}}}{C_{\text{top}} + C_{\text{bot}}} \right)}} \)
\( L = \left( \frac{\text{Radius}^2 \cdot \text{Turns}^2}{9 \cdot \text{Radius} + 10 \cdot \text{Length}} \right) \)

Circuit parameters

Coil parameters

Frequency  Hz Turns
Coil inductance  µH
Beta
Layers

Calculated values

Calculated values

Total capacitance
 
Coil inductance
 
Ctop
 
Self-capacitance
 
Cbottom
 
Resonant frequency
 
Practical frequency range
         to         

Quality factor

Coil DC resistance   Ω
Q value