Watts to dBm conversion
Watts to dBm conversion calculator
Watts (W) to decibel-milliwatts (dBm), power conversion calculator.
Enter the power in watts and press the Convert button:
dBm to watts conversion calculator ►
How to convert watts to dBm
The power conversion of watts to dBm is given by the formula:
P(dBm) = 10 · log10( 1000 · P(W) ) = 10 · log10( P(W) ) + 30
so
1W = 30dBm
Example
Convert 20 watts to dBm:
P(dBm) = 10 · log10(1000·20W) = 43.0103dBm
Watt to dBm conversion table
Power (mW) Power (dBm) 0 W not defined 0+ W -∞ dBm 0.00001 W -20.0000 dBm 0.0001 W -10.0000 dBm 0.001 W 0.0000 dBm 0.01 W 10.0000 dBm 0.1 W 20.0000 dBm 1 W 30.0000 dBm 10 W 40.0000 dBm 100 W 50.0000 dBm 1000 W 60.0000 dBm 10000 W 70.0000 dBm 100000 W 80.0000 dBm 1000000 W 90.0000 dBm
See also
Online Reference & Tools