G3
Reviewed for accuracy · Maintained by Justin Evans
G3 highlighted — use the view toggle to see all 88 keys.
Piano key
35 of 88
Octave
3
Frequency
196 Hz
MIDI number
55
Key color
White key
Pitch class
G · F## · Abb
What is G3?
G3 is the G in octave 3 — the 35th key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 196 Hz. It sits 5 half-steps below middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count down from middle C (C4) 1 octave to reach octave 3, then step to G.
Every octave doubles the frequency: the G one octave up sounds at 392 Hz and the one below at 98 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: