🎵 Resonant Frequency Calculator
Find the resonant frequency of an inductor-capacitor (LC) circuit from its inductance and capacitance values.
What is resonant frequency?
In an LC circuit made of an inductor (L) and a capacitor (C), energy oscillates back and forth between the inductor’s magnetic field and the capacitor’s electric field. The resonant frequency is the natural rate at which this oscillation occurs, and it is the frequency at which the circuit’s impedance is at a minimum (series) or maximum (parallel).
The formula
The resonant frequency is given by the standard formula f₀ = 1 / (2π√(LC)), where L is inductance in henries and C is capacitance in farads. This calculator converts your millihenry and microfarad inputs into base units automatically before applying the formula.
Resonant frequency calculations are widely used in radio tuning circuits, filters, and oscillators. This tool is for general electronics education and reference; real components include parasitic resistance and tolerances that shift the actual resonance slightly.