A6
Reviewed for accuracy · Maintained by Justin Evans
A6 highlighted — use the view toggle to see all 88 keys.
Piano key
73 of 88
Octave
6
Frequency
1760 Hz
MIDI number
93
Key color
White key
Pitch class
A · G## · Bbb
What is A6?
A6 is the A in octave 6 — the 73rd key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 1760 Hz. It sits 33 half-steps above middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count up from middle C (C4) 2 octaves to reach octave 6, then step to A.
Every octave doubles the frequency: the A one octave up sounds at 3520 Hz and the one below at 880 Hz. The same piano key can be written as A, G##, Bbb depending on the musical context — same sound, different spelling.
Nearby notes
Every A on the keyboard: