Use this body-composition measurement as a screening or estimation aid when the required measurements were collected with the method and units stated by the tool.

Height (cm)

Required number input.

Measured resistance (ohm)

Required number input.

Calculate height squared divided by measured electrical resistance; this is an impedance index, not a body-fat estimate. 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]

Impedance index (cm2/ohm)

The resulting impedance index returned as a number.

• Population equations and screening indices do not directly diagnose health or measure every body compartment. Hydration, age, sex, ethnicity, athletic build, measurement technique, and the population used to derive an equation can affect interpretation.
• 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.

Interpret the result with other measurements, trends, medical history, and professional guidance. Use a validated reference method when individual body composition must be measured more directly.

• Relay Coil Power

  Calculate DC relay-coil electrical power as applied voltage squared divided by coil resistance; AC impedance is outside this model.

• GaN HEMT Rds On Tempco

  Calculate average GaN HEMT on-resistance temperature coefficient as percent change per Celsius degree between two measured temperatures; this is not a local derivative.

• Cabin Rate of Climb

  Calculate the average cabin-altitude change in feet per minute from two cabin altitudes and elapsed minutes. A negative result means cabin descent; this is a measured average, not an aircraft operating limit.