dBm to Watt Conversion Table

dBm
Watts
 
dBm
Watts
 
dBm
Watts
0
1.0 mW
 
16
40 mW
 
32
1.6 W
1
1.3 mW
 
17
50 mW
 
33
2.0 W
2
1.6 mW
 
18
63 mW
 
34
2.5 W
3
2.0 mW
 
19
79 mW
 
35
3.2 W
4
2.5 mW
 
20
100 mW
 
36
4.0 W
5
3.2 mW
 
21
126 mW
 
37
5.0 W
6
4 mW
 
22
158 mW
 
38
6.3 W
7
5 mW
 
23
200 mW
 
39
8.0 W
8
6 mW
 
24
250 mW
 
40
10 W
9
8 mW
 
25
316 mW
 
41
13 W
10
10 mW
 
26
398 mW
 
42
16 W
11
13 mW
 
27
500 mW
 
43
20 W
12
16 mW
 
28
630 mW
 
44
25 W
13
20 mW
 
29
800 mW
 
45
32 W
14
25 mW
 
30
1.0 W
 
46
40 W
15
32 mW
 
31
1.3 W
 
47
50 W

The equation of dBm to Watt conversion is:

dBm = 10 * (log (1000 * P))
P = Power in Watts
1000mW = 1 Watt
Note, doubling the wattage increases dBm by 3.

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