Watt to dBW Calculator

This calculator can be used to convert Watt to dBW or dBWatt.

Enter the linear power value.

Use the drop down menu to select the units: Watt, Milliwatt, Microwatt or Nanowatt or Picowatt.

The tool will provide the dBW equivalent.

🔁 dBW to Watt

Formula

P_dBW = 10*Log₁₀(P_W)

where P_W is power expressed in Watt

Background

dBW stands for deciBel relative to one Watt.

It is a unit used to measure absolute power levels on the dB scale. DeciBels are a logarithmic scale that represents the ratio between two power levels. The dBW scale is often used to express power levels in the context of Radio Frequency (RF) and Telecommunications systems.

One Watt is equivalent to 0 dBW. Every increase of 3 dB on the dBW scale represents a doubling of power, so 3 dBW is equal to 2 watts, 6 dBW is equal to 4 watts, and so on.

Conversely, every decrease of 3 dB represents a halving of power from the reference. For example, -3 dBW is equal to half a watt, -6 dBW is equal to a quarter watt, and so forth. Using the dBW scale allows for convenient comparison and representation of power levels, especially when dealing with both large and small values.

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Watt to dBW Table

Watt	dBW
1	0.00
2	3.01
3	4.77
4	6.02
5	6.99
6	7.78
7	8.45
8	9.03
9	9.54
10	10.00
11	10.41
12	10.79
13	11.14
14	11.46
15	11.76
16	12.04
17	12.30
18	12.55
19	12.79
20	13.01
21	13.22
22	13.42
23	13.62
24	13.80
25	13.98
26	14.15
27	14.31
28	14.47
29	14.62
30	14.77
31	14.91
32	15.05
33	15.19
34	15.31
35	15.44
36	15.56
37	15.68
38	15.80
39	15.91
40	16.02
41	16.13
42	16.23
43	16.33
44	16.43
45	16.53
46	16.63
47	16.72
48	16.81
49	16.90
50	16.99
51	17.08
52	17.16
53	17.24
54	17.32
55	17.40
56	17.48
57	17.56
58	17.63
59	17.71
60	17.78
61	17.85
62	17.92
63	17.99
64	18.06
65	18.13
66	18.20
67	18.26
68	18.33
69	18.39
70	18.45
71	18.51
72	18.57
73	18.63
74	18.69
75	18.75
76	18.81
77	18.86
78	18.92
79	18.98
80	19.03
81	19.08
82	19.14
83	19.19
84	19.24
85	19.29
86	19.34
87	19.40
88	19.44
89	19.49
90	19.54
91	19.59
92	19.64
93	19.68
94	19.73
95	19.78
96	19.82
97	19.87
98	19.91
99	19.96
100	20.00