How to use the lc resonant frequency calculator
Find resonant frequency of an LC circuit. Enter inductance, capacitance in the fields above; the resonant frequency, characteristic impedance are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- L — Inductance (µH)
- C — Capacitance (pF)
Worked example
With inductance = 100 µH, capacitance = 220 pF, the calculator gives resonant frequency ≈ 1.073022 MHz; characteristic impedance ≈ 674.1999 Ω.
Frequently asked questions
What is the formula for the lc resonant frequency calculation?
Resonant frequency (MHz) = 1 / (2 × π × √(L × 1e-6 × C × 1e-12)) / 1e6. Characteristic impedance (Ω) = √(L × 1e-6 / (C × 1e-12)). Here L is inductance (µH), C is capacitance (pF).
What inputs do I need for the lc resonant frequency calculator?
You need inductance in µH, capacitance in pF. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.