dBm / Watt Converter
Convert between dBm, Watts, milliwatts, dBW, and RMS voltage at a given impedance.
dBm
20 dBm
Watts
0.1 W
Milliwatts
100 mW
dBW
-10 dBW
V_rms (Z = 50 Ω)
2.2361 V
P_W = 10^((dBm − 30) / 10)
V_rms = √(P_W × Z)
dBW = dBm − 30
Convert between dBm, Watts, milliwatts, dBW, and RMS voltage at a given impedance.