Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Kn (A/V²)

Required number in A/V².

VDS (V)

Required number in V.

The cited overview of MOSFET supplies background for the terminology and domain context used by this tool.^[1]

Compute MOSFET transconductance in the linear (triode) region. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

gm (S)

Returned number in S.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Kn must be at least 5e-324.
• VDS must be at least 5e-324.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.

• MOSFET Transconductance Saturation Calculator

  Compute MOSFET transconductance in saturation from Kn and overdrive voltage.

• TID Threshold Shift Calculator

  Compute the radiation-induced MOSFET threshold-voltage shift from total ionizing dose and a linear dose response.

• Weak-Inversion GM/ID Calculator

  Compute the weak-inversion MOSFET transconductance efficiency gm/ID = 1/(n kT/q) from ideality factor and absolute temperature.