LC Resonant Frequency Calculator

This calculator helps you find the resonant frequency of an LC circuit. Enter the inductance and capacitance values to compute the frequency where the circuit naturally oscillates. Common in RF, filter, and oscillator designs.

What this calculator is doing

An LC circuit (or "tank circuit") resonates at a frequency determined by its inductance $ L $ and capacitance $ C $. At resonance, the inductive reactance and capacitive reactance are equal in magnitude and cancel each other out, allowing the circuit to oscillate at its natural frequency. The resonant frequency is calculated by the following formula:

$$ f = \frac{1}{2\pi \sqrt{LC}} $$

Where:

$ f $ is the resonant frequency in hertz (Hz)
$ L $ is the inductance in henrys (H)
$ C $ is the capacitance in farads (F)

This formula assumes an ideal LC circuit without resistance. Real-world designs may require adjustments for damping or parasitic losses.

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Disclaimer: These calculators are provided for informational purposes only. Always verify your designs against relevant engineering standards and consult a qualified professional. We do not take responsibility for any errors or damages resulting from the use of these calculations.