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.

Interface Thickness (m) (m)

Required number input.

Thermal Conductivity Watts Per Meter (K) (K)

Required number input.

Contact Area (m²) (m²)

Required number input.

Calculate ideal thermal interface resistance t/(kA) from uniform pad thickness, thermal conductivity, and contact area; contact imperfections are excluded. 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]

Thermal Resistance (K/W) (K/W)

The resulting thermal resistance (k/w) returned as a number.

• 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.

• PCB Plane Capacitance

  Calculate ideal parallel-plane PCB capacitance as ε0 εr A/d from overlapping copper area, dielectric thickness, and relative permittivity; fringe fields are excluded.

• ADC Quantization Error Bound

  Calculate the ideal rounding quantizer's maximum absolute error as half an ADC LSB. Assumes a uniform quantizer and input within the conversion range; offset, gain, and noise errors are excluded.

• Thermal Via Barrel Resistance

  Estimate one-dimensional thermal resistance through the plated via barrel, L/(kA), where A is the annular copper cross-section. Board laminate, pads, and spreading resistance are excluded.