Physics

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LC Resonant Frequency Calculator.

Calculate ideal LC resonant frequency.

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Set your values

Results update as you type.

Frequency: 5,032.92121 Hz

Frequency

0.000000Hz
Angular frequency: 31,622.776602 rad/s

Angular frequency

0.000000rad/s

Results update automatically as you type.

Use Cases

Designing resonant circuits

Determine the natural frequency of an LC circuit for applications like oscillators, filters, and tuning circuits.

Example: Given L = 0.1 H and C = 0.00001 F, the resonant frequency is approximately 159.15 Hz.

Educational verification

Check your manual calculations or verify the resonant frequency of a circuit in a physics or electronics lab.

Example: Use it to confirm the frequency of a tank circuit in an experiment.

Frequently Asked Questions

What is the LC resonant frequency?
The LC resonant frequency is the frequency at which an inductor (L) and capacitor (C) in a circuit naturally oscillate. It is determined by the formula f = 1 / (2π√(LC)). This calculator uses your inductance and capacitance values to compute that frequency.
How do I use this calculator?
Enter the inductance in henries (H) and the capacitance in farads (F) into the respective fields. The calculator will compute the ideal resonant frequency using the standard formula. Ensure you use consistent units (H and F) for accurate results.
What units should I use for inductance and capacitance?
The calculator expects inductance in henries (H) and capacitance in farads (F). If your values are in millihenries (mH) or microfarads (µF), convert them to H and F before entering. For example, 1 mH = 0.001 H and 1 µF = 0.000001 F.

Tips & Common Mistakes

Tips

  • Ensure inductance and capacitance are in base units (H and F) to get the frequency in hertz (Hz).
  • For small values, use scientific notation (e.g., 1e-6 for 1 µF) to avoid errors.
  • Double-check your values: a small change in capacitance or inductance significantly affects the frequency.
  • This calculator provides the ideal resonant frequency, ignoring parasitic resistance and other real-world effects.

Common Mistakes to Avoid

  • Forgetting to convert millihenries (mH) or microfarads (µF) to henries (H) and farads (F).
  • Using the formula incorrectly, such as omitting the factor 2π or the square root.
  • Entering values in mixed units without conversion, leading to incorrect results.

Last updated: August 13, 2026