Conversions & Fundamentals

RF Power Converter

Convert dBm, dBW, watts, milliwatts, microwatts and matched-load RMS voltage.

Inputs

Results update as you enter values. Inputs stay in this browser session only.

Known value

Known quantitySystem impedance

Used only for the voltage relationship.

dBm

0 dBm

dBW

-30 dBW

Watts

0.001 W

Milliwatts

1 mW

Microwatts

1,000 µW

Matched RMS voltage

0.2236 Vrms

P(W) = 10^((dBm − 30)/10); Vrms = √(P × R).

Vrms assumes a resistive, matched load at the selected impedance (50 Ω by default).