Below you can find a list of frequencies of all the keys on a piano. Click on a row to hear the note played.

Here are some key highlights from the frequency list below:

  • Middle C has a frequency of 261.626 Hz
  • The highest note on a standard piano has a frequency of 4186.009 Hz. It is a C.
  • The lowest note on a standard piano has a frequency of 27.5 Hz. It is an A.
Key Number Midi Number Name Frequency (Hz)
88 108 C8 4186.009
87 107 B7 3951.066
86 106 Bb7 3729.31
85 105 A7 3520.0
84 104 Ab7 3322.438
83 103 G7 3135.963
82 102 F#7 2959.955
81 101 F7 2793.826
80 100 E7 2637.02
79 99 Eb7 2489.016
78 98 D7 2349.318
77 97 C#7 2217.461
76 96 C7 2093.005
75 95 B6 1975.533
74 94 Bb6 1864.655
73 93 A6 1760.0
72 92 Ab6 1661.219
71 91 G6 1567.982
70 90 F#6 1479.978
69 89 F6 1396.913
68 88 E6 1318.51
67 87 Eb6 1244.508
66 86 D6 1174.659
65 85 C#6 1108.731
64 84 C6 1046.502
63 83 B5 987.767
62 82 Bb5 932.328
61 81 A5 880.0
60 80 Ab5 830.609
59 79 G5 783.991
58 78 F#5 739.989
57 77 F5 698.456
56 76 E5 659.255
55 75 Eb5 622.254
54 74 D5 587.33
53 73 C#5 554.365
52 72 C5 523.251
51 71 B4 493.883
50 70 Bb4 466.164
49 69 A4 440.0
48 68 Ab4 415.305
47 67 G4 391.995
46 66 F#4 369.994
45 65 F4 349.228
44 64 E4 329.628
43 63 Eb4 311.127
42 62 D4 293.665
41 61 C#4 277.183
40 60 C4 261.626
39 59 B3 246.942
38 58 Bb3 233.082
37 57 A3 220.0
36 56 Ab3 207.652
35 55 G3 195.998
34 54 F#3 184.997
33 53 F3 174.614
32 52 E3 164.814
31 51 Eb3 155.563
30 50 D3 146.832
29 49 C#3 138.591
28 48 C3 130.813
27 47 B2 123.471
26 46 Bb2 116.541
25 45 A2 110.0
24 44 Ab2 103.826
23 43 G2 97.999
22 42 F#2 92.499
21 41 F2 87.307
20 40 E2 82.407
19 39 Eb2 77.782
18 38 D2 73.416
17 37 C#2 69.296
16 36 C2 65.406
15 35 B1 61.735
14 34 Bb1 58.27
13 33 A1 55.0
12 32 Ab1 51.913
11 31 G1 48.999
10 30 F#1 46.249
9 29 F1 43.654
8 28 E1 41.203
7 27 Eb1 38.891
6 26 D1 36.708
5 25 C#1 34.648
4 24 C1 32.703
3 23 B0 30.868
2 22 Bb0 29.135
1 21 A0 27.5