G2
G2 highlighted — use the view toggle to see all 88 keys.
Piano key
23 of 88
Octave
2
Frequency
98 Hz
MIDI number
43
Key color
White key
Pitch class
G, F##, Abb
What is G2?
G2 is the G in octave 2 — the 23rd key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 98 Hz. It sits 17 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) 2 octaves to reach octave 2, then step to G.
Every octave doubles the frequency: the G one octave up sounds at 196 Hz and the one below at 49 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: