LC Resonant Frequency Calculator

Calculate the resonant frequency of an ideal LC circuit (tank circuit) given its inductance and capacitance.

Tank Circuit Parameters

Enter values to calculate resonant frequency

LC Tank Circuit

LC

Quick Guide

Resonant Frequency Formula:

fr=
12π√(LC)

Resonance occurs when the inductive reactance ($X_L$) equals the capacitive reactance ($X_C$). At this specific frequency, the total impedance of a parallel tank circuit is at its maximum, and it acts as a band-pass filter (or oscillator tank).

Applications:

  • Radio frequency (RF) oscillators
  • Band-pass and band-stop filters
  • Tuning circuits in radios and receivers
  • Impedance matching networks