**dB** or deciBel is used to express the ratio of two power or voltage amplitude values on a logarithmic scale.

**Hz** (Hertz) is a unit of Frequency. Frequency refers to the number of occurrences of a repeating event per unit of time. It can be calculated from the period of a waveform or from its wavelength.

Amplitude and Frequency are not related in any way. In general therefore dB cannot be converted to Hz.

**There is an exception however.** The ratio of two frequencies can be expressed on a logarithmic scale as dB-Hz. Wikipedia Reference

**dB-Hz or dB (Hz) is the bandwidth relative to 1 Hz** expressed on a logarithmic scale. *Note the suffix Hz. It’s important that this be included. *The formula for the conversion is:

**X _{dB-Hz} = 10*Log_{10}(X_{Hz}/1 Hz)**

A linear number can be converted to its dB equivalent.

The formula is **X _{linear}** =

**10**

^{(XdB/10)}Similarly,

**X _{Hz}** =

**10**

^{(XdB-Hz)/10}dB is logarithmic in nature. The benefit of using dB is that a very large (or very small) ratio can be conveniently represented by a small number. For example, 10000000000 Hz = 100 dB-Hz.

This tool below converts deciBel Hertz (**dB-Hz**) to Hertz (**Hz**).

**Converter**

**Example Calculations**

**20 dB-Hz** is equivalent to **100 Hz**.

Similarly **30 dB-Hz** is equivalent to **1000 Hz**.

**dB to Hz Table**

dB (Hz) | Hz |

1 | 1.26 |

2 | 1.58 |

3 | 2.00 |

4 | 2.51 |

5 | 3.16 |

6 | 3.98 |

7 | 5.01 |

8 | 6.31 |

9 | 7.94 |

10 | 10.00 |

11 | 12.59 |

12 | 15.85 |

13 | 19.95 |

14 | 25.12 |

15 | 31.62 |

16 | 39.81 |

17 | 50.12 |

18 | 63.10 |

19 | 79.43 |

20 | 100.00 |

21 | 125.89 |

22 | 158.49 |

23 | 199.53 |

24 | 251.19 |

25 | 316.23 |

26 | 398.11 |

27 | 501.19 |

28 | 630.96 |

29 | 794.33 |

30 | 1000.00 |

31 | 1258.93 |

32 | 1584.89 |

33 | 1995.26 |

34 | 2511.89 |

35 | 3162.28 |

36 | 3981.07 |

37 | 5011.87 |

38 | 6309.57 |

39 | 7943.28 |

40 | 10000.00 |

41 | 12589.25 |

42 | 15848.93 |

43 | 19952.62 |

44 | 25118.86 |

45 | 31622.78 |

46 | 39810.72 |

47 | 50118.72 |

48 | 63095.73 |

49 | 79432.82 |

50 | 100000.00 |

51 | 125892.54 |

52 | 158489.32 |

53 | 199526.23 |

54 | 251188.64 |

55 | 316227.77 |

56 | 398107.17 |

57 | 501187.23 |

58 | 630957.34 |

59 | 794328.23 |

60 | 1000000.00 |

61 | 1258925.41 |

62 | 1584893.19 |

63 | 1995262.31 |

64 | 2511886.43 |

65 | 3162277.66 |

66 | 3981071.71 |

67 | 5011872.34 |

68 | 6309573.44 |

69 | 7943282.35 |

70 | 10000000.00 |

71 | 12589254.12 |

72 | 15848931.92 |

73 | 19952623.15 |

74 | 25118864.32 |

75 | 31622776.60 |

76 | 39810717.06 |

77 | 50118723.36 |

78 | 63095734.45 |

79 | 79432823.47 |

80 | 100000000.00 |

81 | 125892541.18 |

82 | 158489319.25 |

83 | 199526231.50 |

84 | 251188643.15 |

85 | 316227766.02 |

86 | 398107170.55 |

87 | 501187233.63 |

88 | 630957344.48 |

89 | 794328234.72 |

90 | 1000000000.00 |

91 | 1258925411.79 |

92 | 1584893192.46 |

93 | 1995262314.97 |

94 | 2511886431.51 |

95 | 3162277660.17 |

96 | 3981071705.53 |

97 | 5011872336.27 |

98 | 6309573444.80 |

99 | 7943282347.24 |

100 | 10000000000.00 |