The space surrounding an electric charge or in the presence of a time-varying magnetic field has a property called an electric field. This electric field exerts a force on other electrically charged objects. The concept of an electric field was introduced by Michael Faraday.
The electric field is a vector field with SI units of Newtons per coulomb (N C−1) or, equivalently, volts per meter (V m−1). The SI base units of the electric field are kg·m·s−3·A−1. The strength of the field at a given point is defined as the force that would be exerted on a positive test charge of +1 coulomb placed at that point; the direction of the field is given by the direction of that force. Electric fields contain electrical energy with energy density proportional to the square of the field intensity. The electric field is to charge as gravitational acceleration is to mass and force density is to volume. - Wikipedia
These formulas are valid for a 50 Ω system
Volts
dBV
dBμV
Watts
dBW
dBm
dBμA
1 000
60.0
180.0
20 000
43.0
73.0
146.0
750
57.5
177.5
11 250
40.5
70.5
143.5
500
54.0
174.0
5 000
37.0
67.0
140.0
250
48.0
168.0
1 250
31.0
61.0
134.0
200
46.0
166.0
800
29.0
59.0
132.0
100
40.0
160.0
200
23.0
53.0
126.0
75
37.5
157.5
113
20.5
50.5
123.5
50
34.0
154.0
50
17.0
47.0
120.0
25
28.0
148.0
12.5
11.0
41.0
114.0
20
26.0
146.0
8.00
9.03
39.0
112.0
10
20.0
140.0
2.00
3.01
33.0
106.0
7.5
17.5
137.5
1.13
0.51
30.5
103.5
5.0
14.0
134.0
0.50
-3.01
27.0
100.0
2.5
7.96
128.0
0.125
-9.03
21.0
94.0
2.0
6.02
126.0
0.080
-11.0
19.0
92.0
1.0
0.00
120.0
0.020
-17.0
13.0
86.0
0.75
-2.50
117.5
1.1x10-2
-19.5
10.5
83.5
0.50
-6.02
114.0
5.0x10-3
-23.0
6.99
80.0
0.25
-12.0
108.0
1.3x10-3
-29.0
0.97
74.0
0.20
-14.0
106.0
8.0x10-4
-31.0
-0.97
72.0
0.10
-20.0
100.0
2.0x10-4
-37.0
-6.99
66.0
7.5x10-2
-22.5
97.5
1.1x10-4
-39.5
-9.49
63.5
5.0x10-2
-26.0
94.0
5.0x10-5
-43.0
-13.0
60.0
2.5x10-2
-32.0
88.0
1.3x10-5
-49.0
-19.0
54.0
2.0x10-2
-34.0
86.0
8.0x10-6
-51.0
-21.0
52.0
1.0x10-2
-40.0
80.0
2.0x10-6
-57.0
-27.0
46.0
7.5x10-3
-42.5
77.5
1.1x10-6
-59.5
-29.5
43.5
5.0x10-3
-46.0
74.0
5.0x10-7
-63.0
-33.0
40.0
2.5x10-3
-52.0
68.0
1.3x10-7
-69.0
-39.0
34.0
2.0x10-3
-54.0
66.0
8.0x10-8
-71.0
-41.0
32.0
1.0x10-3
-60.0
60.0
2.0x10-8
-77.0
-47.0
26.0
7.5x10-4
-62.5
57.5
1.1x10-8
-79.5
-49.5
23.5
5.0x10-4
-66.0
54.0
5.0x10-9
-83.0
-53.0
20.0
2.5x10-4
-72.0
48.0
1.3x10-9
-89.0
-59.0
14.0
2.0x10-4
-74.0
46.0
8.0x10-10
-91.0
-61.0
12.0
1.0x10-4
-80.0
40.0
2.0x10-10
-97.0
-67.0
6.0
7.5x10-5
-82.5
37.5
1.1x10-10
-99.5
-69.5
3.5
5.0x10-5
-86.0
34.0
5.0x10-11
-103.0
-73.0
0.0
2.5x10-5
-92.0
28.0
1.3x10-11
-109.0
-79.0
-6.0
2.0x10-5
-94.0
26.0
8.0x10-12
-111.0
-81.0
-8.0
1.0x10-5
-100.0
20.0
2.0x10-12
-117.0
-87.0
-14.0
7.5x10-6
-102.5
17.5
1.1x10-12
-119.5
-89.5
-16.5
5.0x10-6
-106.0
14.0
5.0x10-13
-123.0
-93.0
-20.0
2.5x10-6
-112.0
7.96
1.3x10-13
-129.0
-99.0
-26.0
2.0x10-6
-114.0
6.02
8.0x10-14
-131.0
-101.0
-28.0
1.0x10-6
-120.0
0.00
2.0x10-14
-137.0
-107.0
-34.0
Power
V@ 1 m
V@ 10 m
V@ 100 m
V@ 1 km
V@ 10 km
1 W
5.5 V/m
0.55 V/m
0.05 V/m
5.5 mV/m
0.55 mV/m
10 W
17.4 V/m
1.7 V/m
0.17 V/m
17 mV/m
1.7 mV/m
100 W
55 V/m
5.5 V/m
0.55 V/m
55 mV/m
5.5 mV/m
1 kW
174 V/m
17.4 V/m
1.74 V/m
170 mV/m
17 mV/m
10 kW
550 V/m
55 V/m
5.5 V/m
550 mV/m
55 mV/m
100 kW
1740 V/m
174 V/m
17.4 V/m
1.74 mV/m
174 mV/m
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