Resonant Frequency Calculator
Compute f₀ for an LC circuit
How to Use This Calculator
1
Enter Inductance
Provide the inductor value in millihenries (mH).
2
Enter Capacitance
Provide the capacitor value in nanofarads (nF).
3
Calculate
Click Calculate to compute the resonant frequency f₀.
Formula
f₀ = 1 / (2π√(LC))
Where: L (H), C (F), f₀ (Hz).
Example: L = 10 mH, C = 100 nF → f₀ ≈ 503.29 Hz.
About Resonant Frequency
The natural frequency of an LC tank determines selectivity in filters and oscillators. Real components add resistance, reducing Q and shifting bandwidth slightly.
Frequently Asked Questions
Is this for series or parallel LC?
Ideal LC resonance is the same formula for both; practical circuits differ by loading and Q.
What about units?
Inputs are mH and nF for convenience; the calculator converts to H and F internally.