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.

Input RMS (V)

Input voltage RMS.

Output RMS (V)

Output voltage RMS.

Compute low-noise amplifier voltage gain in decibels as 20 * log10(vOutRms / vInRms). 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]

Gain (dB)

Voltage gain in decibels.

• RF gain, noise, compression, intercept, mismatch, sensitivity, and link calculations require consistent impedance, bandwidth, frequency, reference plane, temperature, modulation, and cascade ordering. Datasheet values at different conditions cannot be combined without correction.
• 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.

• CMRR dB

  Compute the common-mode rejection ratio in decibels as 20 x log10(differential gain / common mode gain).

• Decibel Voltage Ratio Calculator

  Compute an amplitude ratio in decibels across equal impedances, dB = 20 * log10(V2 / V1); a tenfold voltage increase is +20 dB.

• SINAD dB

  Compute SINAD in decibels as 20 x log10(Vfundamental / sqrt(noise^2 + distortion^2)); there must be some noise or distortion.