Frequencies for Equal-Tempered Scale (A4 = 440 Hz)

Name SI Symbol Value
hertz Hz 1 cycle per second
decahertz daHz 101 Hz
hectohertz hHz 102 Hz
kilohertz KHz 103 Hz
megahertz MHz 106 Hz
gigahertz GHz 109 Hz
terahertz THz 1012 Hz
petahertz PHz 1015 Hz
exahertz EHz 1018 Hz
zettahertz ZHz 1021 Hz
yottahertz YHz 1024 Hz

 

Name SI Symbol Value
decimeter dm 10−1  m
centimeter cm 102 m
millimeter mm 10-3 m
micrometer / micron µm 10-6 m
nanometer nm 10-9 m
picometre pm 10−12  m
femtometre fm 10−15 m
attometre am 10−18 m
zeptometre zm 10−21  m
yoctometre ym 10−24 m

Speed of Sound = 345 m/s = 1130 ft/s = 770 miles/hr

Middle C = C4

Note Frequency (Hz) Wavelength (cm) Piano
Key		 Midi
Note
C 8.17579891564368 0
C♯ / D♭ 8.66195721802722 1
D 9.17702399741896 2
D♯ / E♭ 9.72271824131500 3
E 10.3008611535272 4
F 10.9133822322813 5
F♯ / G♭ 11.5623257097385 6
G 12.2498573744296 7
G♯ / A♭ 12.9782717993732 8
A 13.7500000000000 9
A♯ / B♭ 14.5676175474403 10
B 15.4338531642538 11
C0 16.3515978312874 2109.89 12
C♯0 / D♭0 17.32 1991.47 13
D0 18.35 1879.69 14
D♯0 / E♭0 19.45 1774.20 15
E0 20.60 1674.62 16
F0 21.83 1580.63 17
F♯0 / G♭0 23.12 1491.91 18
G0 24.50 1408.18 19
G♯0 / A♭0 25.96 1329.14 20
A0 27.50 1254.55 Piano, low A 1 21
A♯0 / B♭0 29.14 1184.13 2 22
B0 30.8677063285077 1117.67 5-string Bass,
low B string open		 3 23
C1 32.70 1054.94 4 24
C♯1 / D♭1 34.65 995.73 5 25
D1 36.71 939.85 6 26
D♯1 / E♭1 38.89 887.10 7 27
E1 41.2034446141087 837.31 4-string Bass,
low E string open		 8 28
F1 43.65 790.31 9 29
F♯1 / G♭1 46.25 745.96 10 30
G1 49.00 704.09 11 31
G♯1 / A♭1 51.91 664.57 12 32
A1 55.00 627.27 13 33
A♯1 / B♭1 58.27 592.07 14 34
B1 61.74 558.84 15 35
C2 65.41 527.47 16 36
C♯2 / D♭2 69.30 497.87 17 37
D2 73.42 469.92 18 38
D♯2 / E♭2 77.78 443.55 19 39
E2 82.4068892282174 418.65 Guitar, low E open 20 40
F2 87.31 395.16 21 41
F♯2 / G♭2 92.50 372.98 22 42
G2 98.00 352.04 4- or 5-string Bass,
high G open		 23 43
G♯2 / A♭2 103.83 332.29 24 44
A2 110.000000000000 313.64 Guitar,
5th string open		 25 45
A♯2 / B♭2 116.54 296.03 26 46
B2 123.47 279.42 27 47
C3 130.812782650299 263.74 6-string Bass,
high C open		 28 48
C♯3 / D♭3 138.59 248.93 29 49
D3 146.832383958704 234.96 Guitar,
4th string open		 30 50
D♯3 / E♭3 155.56 221.77 31 51
E3 164.81 209.33 32 52
F3 174.61 197.58 33 53
F♯3 / G♭3 185.00 186.49 34 54
G3 195.997717990874 176.02 Guitar,
3rd string open
Violin,
low G open		 35 55
G♯3 / A♭3 207.65 166.14 36 56
A3 220.00 156.82 37 57
A♯3 / B♭3 233.08 148.02 38 58
B3 246.94 139.71 39 59
C4 261.63 131.87 40 60
C♯4 / D♭4 277.18 124.47 41 61
D4 293.66 117.48 42 62
D♯4 / E♭4 311.13 110.89 43 63
E4 329.63 104.66 44 64
F4 349.23 98.79 45 65
F♯4 / G♭4 369.99 93.24 46 66
G4 392.00 88.01 47 67
G♯4 / A♭4 415.30 83.07 48 68
A4 440.00 78.41 49 69
A♯4 / B♭4 466.16 74.01 50 70
B4 493.88 69.85 51 71
C5 523.25 65.93 52 72
C♯5 / D♭5 554.37 62.23 53 73
D5 587.33 58.74 54 74
D♯5 / E♭5 622.25 55.44 55 75
E5 659.25 52.33 56 76
F5 698.46 49.39 57 77
F♯5 / G♭5 739.99 46.62 58 78
G5 783.99 44.01 59 79
G♯5 / A♭5 830.61 41.54 60 80
A5 880.00 39.20 61 81
A♯5 / B♭5 932.33 37.00 62 82
B5 987.766602512249 34.93 63 83
C6 1046.50226120239 32.97 64 84
C♯6 / D♭6 1108.73052390749 31.12 65 85
D6 1174.65907166963 29.37 66 86
D♯6 / E♭6 1244.50793488832 27.72 67 87
E6 1318.51022765148 26.17 Guitar,
1st string 24th fret		 68 88
F6 1396.91292573202 24.70 69 89
F♯6 / G♭6 1479.97769084654 23.31 70 90
G6 1567.98174392700 22.00 71 91
G♯6 / A♭6 1661.21879031978 20.77 72 92
A6 1760.00000000000 19.60 73 93
A♯6 / B♭6 1864.65504607236 18.50 74 94
B6 1975.53320502450 17.46 75 95
C7 2093.00452240479 16.48 76 96
C♯7 / D♭7 2217.46104781498 15.56 77 97
D7 2349.31814333926 14.69 78 98
D♯7 / E♭7 2489.02 13.86 79 99
E7 2637.02 13.08 80 100
F7 2793.83 12.35 81 101
F♯7 / G♭7 2959.96 11.66 82 102
G7 3135.96 11.00 83 103
G♯7 / A♭7 3322.44 10.38 84 104
A7 3520.00 9.80 85 105
A♯7 / B♭7 3729.31 9.25 86 106
B7 3951.07 8.73 87 107
C8 4186.01 8.24 Piano, upper C 88 108
C♯8 / D♭8 4434.92 7.78 109
D8 4698.63 7.34 110
D♯8 / E♭8 4978.03 6.93 111
E8 5274.04 6.54 112
F8 5587.65 6.17 113
F♯8 / G♭8 5919.91 5.83 114
G8 6271.93 5.50 115
G♯8 / A♭8 6644.88 5.19 116
A8 7040.00 4.90 117
A♯8 / B♭8 7458.62 4.63 118
B8 7902.13 4.37 119
C9 8372.01808961917 120
C♯9 / D♭9 8869.84419125992 121
D9 9397.27257335706 122
D♯9 / E♭9 9956.06347910661 123
E9 10548.0818212119 124
F9 11175.3034058561 125
F♯9 / G♭9 11839.8215267723 126
G9 12543.8539514160 127

 

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