dBm to dBuV Calculator

This tool converts from dBm (dB-milliwatt) to dBuV (dB-microvolt).

  • The default impedance is 50 Ω although it can be changed to any value.
  • Microvolt is a Root-mean-square (RMS) quantity

dBuV to dBm


dBuV = dBm + 10*Log10(Z) + 90

Example Calculation

-90 dBm into 25 ohm gives a value of 14 dBuV.