Wireless Power Chart

Power Level Chart
40 dBm 10.00 watts
36 dBm 4.00 watts { Maximum ERP allowed by FCC in U.S. and Doc in Canada
30 dBm 1.00 watts { Output from WAVEAMP
29 dBm 0.79 watts
28 dBm 0.63 watts
27 dBm 0.50 watts
26 dBm 0.40 watts
25 dBm 0.32 watts
24 dBm 0.25 watts
23 dBm 0.20 watts { Typical output from WLAN devices at 915MHz
22 dBm 0.16 watts
21 dBm 0.13 watts
20 dBm 0.10 watts { Maximum ERP allowed by E.T.S.I. In Europe, also typical 
output from WLAN devices at 2.4 GHz
19 dBm 79 milliwatts
18 dBm 63 milliwatts
17 dBm 50 milliwatts
16 dBm 40 milliwatts
15 dBm 32 milliwatts
14 dBm 25 milliwatts
13 dBm 20 milliwatts
12 dBm 16 milliwatts
11 dBm 13 milliwatts
10 dBm 10 milliwatts
9 dBm 7.9 milliwatts
8 dBm 6.3 milliwatts
7 dBm 5.0 milliwatts
6 dBm 4.0 milliwatts
5 dBm 3.2 milliwatts
4 dBm 2.5 milliwatts
3 dBm 2.0 milliwatts
2 dBm 1.6 milliwatts
1 dBm 1.3 milliwatts
0 dBm 1.0 milliwatts
1- dBm 0.79 milliwatts
2- dBm 0.63 milliwatts
3- dBm 0.50 milliwatts
4- dbm 0.40 milliwatts
5- dBm 0.32 milliwatts
6- dBm 0.25 milliwatts
7- dBm 0.20 milliwatts
8- dBm 0.16 milliwatts
9- dBm 0.13 milliwatts
10- dBm 0.1 milliwatts
20- dBm 0.01 milliwatts
30- dBm 0.001 milliwatts
40- dBm 0.0001 milliwatts
50- dBm 0.00001 milliwatts
60- dBm 0.000001 milliwatts
70- dBm 0.0000001 milliwatts
80- dBm 0.00000001 milliwatts {Receive threshold for most WLAN devices