LC Parallel Resonant Circuit Online Calculator

LC Parallel Resonant Circuit Calculator

ELECTRONICS TOOL

Solve for resonant frequency, inductance, or capacitance — plus Q-factor, X_L and R_w from bandwidth.

LC PARALLEL RESONANT CIRCUIT

f_r — Frequency

L — Inductance

C — Capacitance

Resonant Frequency (f_r)

Hz kHz MHz

Inductance (L)

mH µH nH

Capacitance (C)

µF nF pF

Bandwidth (BW) — for Q & R_w

Hz kHz MHz

f_r = 1 / ( 2π · √(L · C) )

RESULTS

Resonant Freq (f_r) —

Inductive Reactance (X_L) —

Winding Resistance (R_w) —

Quality Factor (Q) —

In a parallel LC tank circuit, L and C are connected in parallel. At resonance, X_L = X_C and the impedance is maximum (opposite to series). The Q-factor measures energy stored vs. energy dissipated per cycle — a higher Q means a sharper frequency response. R_w is the winding resistance of the inductor that limits Q. Tank circuits are used in RF oscillators, bandpass filters, and antenna tuners.

Press Enter in any field to calculate instantly · Uses exact π (Math.PI)