calc.engineer / PCB & Electronics / LC Resonance

LC Resonance v1.0.0

Calculates the resonant frequency of an LC circuit, along with optional Q factor and bandwidth when series resistance is provided. The resonant frequency f0 = 1/(2*pi*sqrt(L*C)) is where inductive and capacitive reactances cancel. Used for designing tank circuits, oscillators, bandpass filters, and antenna matching networks. If resistance R is given, computes quality factor Q = (1/R)*sqrt(L/C) and 3 dB bandwidth = f0/Q. Chain into impedance_match to design matching networks at the resonant frequency.

← from rc_filterfeeds impedance_match →
Inductance in henries (H). The inductive element of the LC circuit.
Capacitance in farads (F). The capacitive element of the LC circuit.
Optional series resistance in ohms for Q factor and bandwidth calculation. Omit for ideal LC analysis.
Fill in the inputs and Compute to see the structured result.

From an agent (MCP) or the API

curl -X POST https://calc.engineer/api/lc_resonance \
  -H "Content-Type: application/json" \
  -d '{"inductance_h": …, "capacitance_f": …, "resistance_ohm": …}'

MCP: connect to https://calc.engineer/mcp and call lc_resonance.

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