G5
Reviewed for accuracy · Maintained by Justin Evans
G5 highlighted — use the view toggle to see all 88 keys.
Piano key
59 of 88
Octave
5
Frequency
783.99 Hz
MIDI number
79
Key color
White key
Pitch class
G · F## · Abb
What is G5?
G5 is the G in octave 5 — the 59th key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 783.99 Hz. It sits 19 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) 1 octave to reach octave 5, then step to G.
Every octave doubles the frequency: the G one octave up sounds at 1567.98 Hz and the one below at 392 Hz. The same piano key can be written as G, F##, Abb depending on the musical context — same sound, different spelling.
Nearby notes
Every G on the keyboard: