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 |