MDS 05-4846A01, Rev. H
SD Series Technical Manual
103
8.6 dBm-Watts-Volts Conversion Chart
Table 20 is provided as a convenience for determining the equivalent
wattage or voltage of an RF power expressed in dBm.
Table 20. dBm-Watts-Volts Conversion—for 50 Ohm Systems
dBm V
Po
+53
100.0 200W
+50
70.7
100W
+49
64.0
80W
+48
58.0
64W
+47
50.0
50W
+46
44.5
40W
+45
40.0
32W
+44
32.5
25W
+43
32.0
20W
+42
28.0
16W
+41
26.2
12.5W
+40
22.5
10W
+39
20.0
8W
+38
18.0
6.4W
+37
16.0
5W
+36
14.1
4W
+35
12.5
3.2W
+34
11.5
2.5W
+33
10.0
2W
+32
9.0
1.6W
+31
8.0
1.25W
+30
7.10
1.0W
+29
6.40
800mW
+28
5.80
640mW
+27
5.00
500mW
+26
4.45
400mW
+25
4.00
320mW
+24
3.55
250mW
+23
3.20
200mW
+22
2.80
160mW
+21
2.52
125mW
+20
2.25
100mW
+19
2.00
80mW
+18
1.80
64mW
+17
1.60
50mW
+16
1.41
40mW
+15
1.25
32mW
+14
1.15
25mW
+13
1.00
20mW
+12
.90
16mW
+11
.80
12.5mW
+10
.71
10mW
+9
.64
8mW
+8
.58
6.4mW
+7
.500
5mW
+6
.445
4mW
+5
.400
3.2mW
+4
.355
2.5mW
+3
.320
2.0mW
+2
.280
1.6mW
+1
.252
1.25mW
dBm V
Po
0
.225
1.0mW
-1
.200
.80mW
-2
.180
.64mW
-3
.160
.50mW
-4
.141
.40mW
-5
.125
.32mW
-6
.115
.25mW
-7
.100
.20mW
-8
.090
.16mW
-9
.080
.125mW
-10
.071
.10mW
-11
.064
-12
.058
-13
.050
-14
.045
-15
.040
-16
.0355
dBm mV
Po
-17
31.5
-18
28.5
-19
25.1
-20
22.5
.01mW
-21
20.0
-22
17.9
-23
15.9
-24
14.1
-25
12.8
-26
11.5
-27
10.0
-28
8.9
-29
8.0
-30
7.1
.001mW
-31
6.25
-32
5.8
-33
5.0
-34
4.5
-35
4.0
-36
3.5
-37
3.2
-38
2.85
-39
2.5
-40
2.25
.1µW
-41
2.0
-42
1.8
-43
1.6
-44
1.4
-45
1.25
-46
1.18
-47
1.00
-48
0.90
dBm mV
Po
-49
0.80
-50
0.71
.01µW
-51
0.64
-52
0.57
-53
0.50
-54
0.45
-55
0.40
-56
0.351
-57
0.32
-58
0.286
-59
0.251
-60
0.225 .001µW
-61
0.200
-62
0.180
-63
0.160
-64
0.141
dBm µV
Po
-65
128
-66
115
-67
100
-68
90
-69
80
-70
71
.1nW
-71
65
-72
58
-73
50
-74
45
-75
40
-76
35
-77
32
-78
29
-79
25
-80
22.5
.01nW
-81
20.0
-82
18.0
-83
16.0
-84
11.1
-85
12.9
-86
11.5
-87
10.0
-88
9.0
-89
8.0
-90
7.1
.001nW
-91
6.1
-92
5.75
-93
5.0
-94
4.5
-95
4.0
-96
3.51
-97
3.2
dBm µV
Po
-98
2.9
-99
2.51
-100
2.25
.1pW
-101
2.0
-102
1.8
-103
1.6
-104
1.41
-105
1.27
-106
1.18
dBm nV
Po
-107
1000
-108
900
-109
800
-110
710
.01pW
-111
640
-112
580
-113
500
-114
450
-115
400
-116
355
-117
325
-118
285
-119
251
-120
225
.001pW
-121
200
-122
180
-123
160
-124
141
-125
128
-126
117
-127
100
-128
90
-129
80
.1ƒW
-130
71
-131
61
-132
58
-133
50
-134
45
-135
40
-136
35
-137
33
-138
29
-139
25
-140
23
.01ƒW
