RLC Resonant Frequency Calculator
Calculate the ideal resonant frequency of an LC circuit from inductance and capacitance.
Enter component values
Ideal resonant frequency
Calculated from the entered inductance and capacitance.
About this calculator
Calculate the ideal resonant frequency of an LC circuit from inductance and capacitance.
Use measured or specified component values and frequency for the circuit being evaluated.
Method and assumptions
The ideal resonant frequency is f0 = 1 ÷ (2π√(LC)), where inductance is entered in henries and capacitance is converted from microfarads to farads.
The calculator treats the components as linear, ideal lumped elements at one sinusoidal frequency. It does not model parasitics, magnetic saturation, heating, harmonics, or installation-level resonance.
FAQs
Does this model include real component behavior?
No. It uses ideal lumped-component equations and an entered series resistance. Real components have tolerances, parasitic effects, losses, and frequency-dependent ratings.
Can I use this to analyze facility harmonics or filter design?
No. These single-frequency calculations are not a harmonic study, filter design approval, or resonance assessment for an electrical installation.
Sources
Ideal inductor, capacitor, and series impedance relationships.