Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Capacitance (F)

Tank capacitance.

Inductance (H)

Tank inductance.

Compute the LC tank resonant frequency f0 = 1 / (2 * pi * sqrt(L * C)), where inductive and capacitive reactances cancel. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

f0 (Hz)

Frequency at which the tank resonance occurs.

• Compact electronics formulas omit some combination of tolerances, temperature drift, bandwidth, loading, parasitics, noise spectrum, nonlinearity, clipping, calibration, layout, and device-specific limits. Typical datasheet values are not guaranteed limits.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Colpitts Frequency

  Compute the Colpitts tank frequency f = 1 / (2 * pi * sqrt(L * C1 * C2 / (C1 + C2))).

• Hartley Frequency

  Compute the Hartley tank frequency f = 1 / (2 * pi * sqrt((L1 + L2 + 2M) * C)).

• Series Resonance Impedance

  Compute the impedance in ohms of a series RLC circuit at resonance, where reactances cancel and only the winding resistance remains.