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)

Capacitance of the component.

Frequency (Hz)

Frequency of the applied sinusoid.

Compute capacitive reactance XC = 1 / (2 * pi * f * C), which shrinks as frequency or capacitance grows. 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]

XC (Ω)

Magnitude of the capacitive reactance.

• 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.

• Inductive Reactance Calculator

  Compute inductive reactance XL = 2 * pi * f * L, which grows with frequency and inductance.

• Ideal Capacitor Impedance

  Calculate ideal capacitive reactance Xc=−1/(2πfC) and its magnitude in ohms. ESR, ESL, leakage, and self-resonance are not included.

• ESR From Dissipation Factor

  Compute equivalent series resistance as dissipation factor / (2 x PI x frequency x capacitance).