Unlabeled

The 88 keys of a piano: pitch of each key

From the lowest key at 27.5 Hz to the highest at 4,186 Hz the piano spans 7.25 octaves; middle C is 261.6 Hz.

What does this axis measure?
What does this axis measure?
The 88 keys of a piano: pitch of each key: 30 points, a line chart.
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Frequency (Hz)
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Piano key (number)
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The data: 30 points
Piano key (number)Frequency (Hz)
127.5
432.7
738.89
1046.25
1355
1665.41
1977.78
2292.5
25110
28130.81
31155.56
34185
37220
40261.63
43311.13
46369.99
49440
52523.25
55622.25
58739.99
61880
641046.5
671244.51
701479.98
731760
762093
792489.02
822959.96
853520
884186.01
Source
Computed: twelve-tone equal temperament with A4 = 440 Hz (ISO 16:1975)
Licence
Public domain (computed from a published standard)
Read
2026-09-27
Drawn
30 points as the puzzle showed them · line
  • Ran in puzzle #2 on September 28, 2026. Play it