G♯6 / A♭6
G♯6 highlighted — use the view toggle to see all 88 keys.
Piano key
72 of 88
Octave
6
Frequency
1661.22 Hz
MIDI number
92
Key color
Black key
Pitch class
G#, Ab
What is G♯6?
G♯6 is the G♯ in octave 6 — the 72nd key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 1661.22 Hz. It sits 32 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 G♯.
Every octave doubles the frequency: the G♯ one octave up sounds at 3322.44 Hz and the one below at 830.61 Hz. The same piano key can be written as G#, Ab depending on the musical context — same sound, different spelling.
Nearby notes
Every G♯ on the keyboard: