Ressonância LC
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The LC Resonance Calculator is an online tool that calculates the resonant frequency of an LC circuit, composed of an inductor (L) and a capacitor (C). Resonance occurs when the inductive reactance equals the capacitive reactance, resulting in minimum impedance and maximum current. The formula used is f = 1/(2π√LC), where f is the resonant frequency, L is the inductance, and C is the capacitance.
The formula f = 1/(2π√LC) is derived from the inductive and capacitive reactance equations. Inductive reactance is proportional to frequency and inductance, while capacitive reactance is inversely proportional to frequency and capacitance. When these reactances are equal, the frequency is called the resonant frequency.
The LC Resonance Calculator is useful in various applications, such as filter design, communication circuits, and power systems. It's essential to remember that resonance can be influenced by factors like circuit resistance and component quality.
When using the calculator, it's crucial to input inductance and capacitance values in compatible units, such as henries (H) and farads (F), respectively. Additionally, verify the units of the resonant frequency, which are typically hertz (Hz).
Frequently asked questions
What is LC resonance?
LC resonance occurs when inductive reactance equals capacitive reactance in an LC circuit, resulting in minimum impedance and maximum current.
What units should I use for inductance and capacitance?
Inductance should be input in henries (H) and capacitance in farads (F).
How does circuit resistance affect resonance?
Circuit resistance can affect resonance quality but does not change the resonant frequency.
What are practical applications of LC resonance?
LC resonance is used in filter design, communication circuits, and power systems.
How can I verify the calculator's accuracy?
Check units and input values, and compare results with manual calculations or other resources.