LC Resonant Frequency Calculator
The LC resonant frequency calculator estimates the ideal resonant frequency of a circuit from inductance and capacitance.
How to use this calculator
- Enter positive inductance in millihenries and capacitance in microfarads.
- Check the units and definitions before comparing results with another source.
- Change one input at a time when comparing scenarios, and keep the reporting period and assumptions consistent.
Formula used by the resonant frequency calculator
f₀ = 1/(2π√(LC))
- f₀ = 1/(2π√(LC))
- Component losses, tolerances, parasitic effects and circuit loading shift real resonance. This is a basic formula estimate.
- Inputs are checked for required values and valid ranges; displayed results are rounded for readability.
Worked examples
Worked example
An ideal 10 mH inductor and 1 µF capacitor.
The ideal resonant frequency is about 1,591.55 Hz.
The ideal resonant frequency is about 1,591.55 Hz.
Understanding the result
The LC resonant frequency calculator estimates the ideal resonant frequency of a circuit from inductance and capacitance.
Component losses, tolerances, parasitic effects and circuit loading shift real resonance. This is a basic formula estimate.
Important notes
Component losses, tolerances, parasitic effects and circuit loading shift real resonance. This is a basic formula estimate.
The result applies to the numbers and assumptions entered here; verify specifications for safety-critical or regulated uses.
Frequently asked questions
What does resonance mean in an LC circuit?
At ideal resonance the inductive and capacitive reactance magnitudes match.
Does this give the exact measured frequency?
No. Real component values and circuit losses can shift the measured resonance.
How do I use this calculator?
Enter positive inductance in millihenries and capacitance in microfarads.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.