How to convert the signal power unit dBm and mW?
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Problem Description
How to convert the signal power unit dBm and mW?
Solution
The unit dB is a function used to measure the ratio of signal power to other standard values. The abbreviation dB is often easy to compare with other abbreviations that represent ratios. Therefore, dBm is used instead of dB, which represents the ratio of 1mW to the standard reference value.
The calculation formula for conversion between mW and dBm is: Power (dBm) = 10*log10 (power (mW)/1mW)
For example, for a signal power of 50mW, the formula converted to dBm is as follows:
Power (dBm) = 10*log10(50mW/1mW) = 10*log10(50) = 10 * 1.7 = 17dBm
Table 1 Conversion table of dBm and mW
|
dBm |
mW |
dBm |
mW |
|
0 |
1.0 mW |
- |
- |
|
1 |
1.3 mW |
26 |
400mW |
|
2 |
1.6 mW |
27 |
500mW |
|
3 |
2.0 mW |
28 |
640mW |
|
4 |
2.5 mW |
29 |
800mW |
|
5 |
3.2 mW |
30 |
1.0W |
|
6 |
4.0 mW |
31 |
1.3W |
|
7 |
5.0 mW |
32 |
1.6W |
|
8 |
6.0 mW |
33 |
2.0W |
|
9 |
8.0 mW |
34 |
2.5W |
|
10 |
10 mW |
35 |
3.0W |
|
11 |
13 mW |
36 |
4.0W |
|
12 |
16 mW |
37 |
5.0W |
|
13 |
20 mW |
38 |
6.0W |
|
14 |
25 mW |
39 |
8.0W |
|
15 |
32 mW |
40 |
10W |
|
16 |
40 mW |
41 |
13W |
|
17 |
50 mW |
42 |
16W |
|
18 |
64 mW |
43 |
20W |
|
19 |
80 mW |
44 |
25W |
|
20 |
100 mW |
45 |
32W |
|
21 |
128 mW |
46 |
40W |
|
22 |
160 mW |
47 |
50W |
|
23 |
200 mW |
48 |
64W |
|
24 |
250 mW |
49 |
80W |
|
25 |
320 mW |
50 |
100W |