LC Resonant Frequency Calculator
Enter inductance (L) and capacitance (C) to calculate the resonant frequency of an LC circuit.
LC Circuit Inputs
Enter any two known values; the third is calculated.
Formulas
f
f = 1 / (2π√(L·C))
L
L = 1 / (4π²·f²·C)
C
C = 1 / (4π²·f²·L)
Enter L and C values on the left, then click Calculate.
Resonant Frequency
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Calculation Breakdown
Inductance (L)
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Capacitance (C)
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√(L·C)
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2π√(L·C)
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Result (Hz)
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Common LC Combinations
| L | C | Frequency |
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Summary
Enter inductance (L) and capacitance (C) to calculate the resonant frequency of an LC circuit.
How it works
- Enter the inductance value and select its unit (H, mH, µH, nH).
- Enter the capacitance value and select its unit (F, mF, µF, nF, pF).
- Click Calculate to compute the resonant frequency f = 1 / (2π√(LC)).
- The result is displayed in the most readable unit (Hz, kHz, or MHz).
- Use the Reset button to clear all fields and start a new calculation.
Use cases
- Design LC filters and tank circuits for RF electronics.
- Tune radio receiver front-end circuits to a target frequency.
- Verify component selection for oscillator circuits.
- Calculate the natural frequency of a wireless power transfer coil.
- Check resonance during audio crossover network design.
- Teach or study oscillation theory in physics and electronics courses.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu