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국제테크노정보연구소

dBm - Watts 변환표

고주파회로 설계 등에서는 전력의 표현에 "dBm"이나 "watts"를 널리 사용한다. dBm이란 mW 기준의 절대값 표현으로 0dBm=1mW이다. 변환식은, dBm=10log10 (mW) 이다.
몇몇 값은 기억해 두면 편리하다. 예를 들어, 0dBm=1mW, 10dBm=10mW, 20dBm=100mW, 30dBm=1W, 40dBm=10W 이다.

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

W

dBm

W

0.0

1.00

5.0

3.16

10.0

10.0

15.0

31.6

20.0

100

25.0

316

30.0

1.00

35.0

3.16

0.1

1.02

5.1

3.24

10.1

10.2

15.1

32.4

20.1

102

25.1

324

30.1

1.02

35.1

3.24

0.2

1.05

5.2

3.31

10.2

10.5

15.2

33.1

20.2

105

25.2

331

30.2

1.05

35.2

3.31

0.3

1.07

5.3

3.39

10.3

10.7

15.3

33.9

20.3

107

25.3

339

30.3

1.07

35.3

3.39

0.4

1.10

5.4

3.47

10.4

11.0

15.4

34.7

20.4

110

25.4

347

30.4

1.10

35.4

3.47

0.5

1.12

5.5

3.55

10.5

11.2

15.5

35.5

20.5

112

25.5

355

30.5

1.12

35.5

3.55

0.6

1.15

5.6

3.63

10.6

11.5

15.6

36.3

20.6

115

25.6

363

30.6

1.15

35.6

3.63

0.7

1.17

5.7

3.72

10.7

11.7

15.7

37.2

20.7

117

25.7

372

30.7

1.17

35.7

3.72

0.8

1.20

5.8

3.80

10.8

12.0

15.8

38.0

20.8

120

25.8

380

30.8

1.20

35.8

3.80

0.9

1.23

5.9

3.89

10.9

12.3

15.9

38.9

20.9

123

25.9

389

30.9

1.23

35.9

3.89

1.0

1.26

6.0

3.98

11.0

12.6

16.0

39.8

21.0

126

26.0

398

31.0

1.26

36.0

3.98

1.1

1.29

6.1

4.07

11.1

12.9

16.1

40.7

21.1

129

26.1

407

31.1

1.29

36.1

4.07

1.2

1.32

6.2

4.17

11.2

13.2

16.2

41.7

21.2

132

26.2

417

31.2

1.32

36.2

4.17

1.3

1.35

6.3

4.27

11.3

13.5

16.3

42.7

21.3

135

26.3

427

31.3

1.35

36.3

4.27

1.4

1.38

6.4

4.37

11.4

13.8

16.4

43.7

21.4

138

26.4

437

31.4

1.38

36.4

4.37

1.5

1.41

6.5

4.47

11.5

14.1

16.5

44.7

21.5

141

26.5

447

31.5

1.41

36.5

4.47

1.6

1.45

6.6

4.57

11.6

14.5

16.6

45.7

21.6

145

26.6

457

31.6

1.45

36.6

4.57

1.7

1.48

6.7

4.68

11.7

14.8

16.7

46.8

21.7

148

26.7

468

31.7

1.48

36.7

4.68

1.8

1.51

6.8

4.79

11.8

15.1

16.8

47.9

21.8

151

26.8

479

31.8

1.51

36.8

4.79

1.9

1.55

6.9

4.90

11.9

15.5

16.9

49.0

21.9

155

26.9

490

31.9

1.55

36.9

4.90

2.0

1.58

7.0

5.01

12.0

15.8

17.0

50.1

22.0

158

27.0

501

32.0

1.58

37.0

5.01

2.1

1.62

7.1

5.13

12.1

16.2

17.1

51.3

22.1

162

27.1

513

32.1

1.62

37.1

5.13

2.2

1.66

7.2

5.25

12.2

16.6

17.2

52.5

22.2

166

27.2

525

32.2

1.66

37.2

5.25

2.3

1.70

7.3

5.37

12.3

17.0

17.3

53.7

22.3

170

27.3

537

32.3

1.70

37.3

5.37

2.4

1.74

7.4

5.50

12.4

17.4

17.4

55.0

22.4

174

27.4

550

32.4

1.74

37.4

5.50

2.5

1.78

7.5

5.62

12.5

17.8

17.5

56.2

22.5

178

27.5

562

32.5

1.78

37.5

5.62

2.6

1.82

7.6

5.75

12.6

18.2

17.6

57.5

22.6

182

27.6

575

32.6

1.82

37.6

5.75

2.7

1.86

7.7

5.89

12.7

18.6

17.7

58.9

22.7

186

27.7

589

32.7

1.86

37.7

5.89

2.8

1.91

7.8

6.03

12.8

19.1

17.8

60.3

22.8

191

27.8

603

32.8

1.91

37.8

6.03

2.9

1.95

7.9

6.17

12.9

19.5

17.9

61.7

22.9

195

27.9

617

32.9

1.95

37.9

6.17

3.0

2.00

8.0

6.31

13.0

20.0

18.0

63.1

23.0

200

28.0

631

33.0

2.00

38.0

6.31

3.1

2.04

8.1

6.46

13.1

20.4

18.1

64.6

23.1

204

28.1

646

33.1

2.04

38.1

6.46

3.2

2.09

8.2

6.61

13.2

20.9

18.2

66.1

23.2

209

28.2

661

33.2

2.09

38.2

6.61

3.3

2.14

8.3

6.76

13.3

21.4

18.3

67.6

23.3

214

28.3

676

33.3

2.14

38.3

6.76

3.4

2.19

8.4

6.92

13.4

21.9

18.4

69.2

23.4

219

28.4

692

33.4

2.19

38.4

6.92

3.5

2.24

8.5

7.08

13.5

22.4

18.5

70.8

23.5

224

28.5

708

33.5

2.24

38.5

7.08

3.6

2.29

8.6

7.24

13.6

22.9

18.6

72.4

23.6

229

28.6

724

33.6

2.29

38.6

7.24

3.7

2.34

8.7

7.41

13.7

23.4

18.7

74.1

23.7

234

28.7

741

33.7

2.34

38.7

7.41

3.8

2.40

8.8

7.59

13.8

24.0

18.8

75.9

23.8

240

28.8

759

33.8

2.40

38.8

7.59

3.9

2.45

8.9

7.76

13.9

24.5

18.9

77.6

23.9

245

28.9

776

33.9

2.45

38.9

7.76

4.0

2.51

9.0

7.94

14.0

25.1

19.0

79.4

24.0

251

29.0

794

34.0

2.51

39.0

7.94

4.1

2.57

9.1

8.13

14.1

25.7

19.1

81.3

24.1

257

29.1

813

34.1

2.57

39.1

8.13

4.2

2.63

9.2

8.32

14.2

26.3

19.2

83.2

24.2

263

29.2

832

34.2

2.63

39.2

8.32

4.3

2.69

9.3

8.51

14.3

26.9

19.3

85.1

24.3

269

29.3

851

34.3

2.69

39.3

8.51

4.4

2.75

9.4

8.71

14.4

27.5

19.4

87.1

24.4

275

29.4

871

34.4

2.75

39.4

8.71

4.5

2.82

9.5

8.91

14.5

28.2

19.5

89.1

24.5

282

29.5

891

34.5

2.82

39.5

8.91

4.6

2.88

9.6

9.12

14.6

28.8

19.6

91.2

24.6

288

29.6

912

34.6

2.88

39.6

9.12

4.7

2.95

9.7

9.33

14.7

29.5

19.7

93.3

24.7

295

29.7

933

34.7

2.95

39.7

9.33

4.8

3.02

9.8

9.55

14.8

30.2

19.8

95.5

24.8

302

29.8

955

34.8

3.02

39.8

9.55

4.9

3.09

9.9

9.77

14.9

30.9

19.9

97.7

24.9

309

29.9

977

34.9

3.09

39.9

9.77

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

mW

dBm

W

dBm

W

 

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