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.

Baseline capacitance (pF)

Required number input.

Measured capacitance (pF)

Required number input.

Subtract baseline touch-electrode capacitance from measured capacitance; the signed delta distinguishes increases from decreases. 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]

Touch capacitance change (pF)

The resulting touch capacitance change returned as a number.

• Capacitance, ESR, leakage, ripple rating, lifetime, and self-resonance vary with frequency, temperature, DC bias, aging, dielectric, package, and mounting. Nominal capacitance alone does not determine in-circuit impedance or reliability.
• 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.

• Touch Panel Capacitance

  Ideal parallel-plate touch electrode capacitance from overlap area, dielectric thickness and relative permittivity.

• Audio Crossover Slope

  Find signed filter attenuation slope in dB per octave between two measured frequencies; nonlinear transitions need more points.

• Offset Drift

  Compute the signed input offset voltage drift as delta Voffset(uV) / delta T(degC); the temperature interval must not be zero.