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Mihsaba›LC Resonant Frequency Calculator

LC Resonant Frequency Calculator

Calculate resonant frequency, angular frequency and period for an ideal LC circuit from inductance and capacitance with common engineering units.

Results are idealized or estimated; component behavior, temperature, losses and battery discharge curves can change real-world values.

How to use

This tool calculates the natural resonant frequency of an ideal LC circuit from inductance and capacitance. At that frequency, inductive and capacitive reactance magnitudes match in the ideal model.

  1. Enter L and its unit.
  2. Enter C and its unit.
  3. Calculate f₀, ω₀ and period.

How it is calculated

f₀=1/[2π√(LC)]; ω₀=1/√(LC); T=1/f₀

Example

Example: L=10 mH and C=1 µF gives a resonant frequency of about 1591.55 Hz.

Important notes

Real resonance is affected by resistance, losses and parasitics; this is the ideal LC equation.

Frequently asked questions

What happens if C increases?

Resonant frequency falls as 1/√C.

Does resistance enter f₀ here?

Not in the ideal LC model.

Are mH and µF supported?

Yes.