G#m7b5 chord on guitar

The G# half diminished chord, written G#m7b5, has 4 notes: G# B D F#. The root G# is also written Ab, so Abm7b5 is the same chord.

G#m7b5○○4213
420102
G#m7b54121134
454477

As tab, thick low E string first: 420102, 454477. Numbers in the dots are fingers: 1 index, 2 middle, 3 ring, 4 little, T thumb. × marks a muted string and ○ an open one.

NotesG# B D F#
Formula1 b3 b5 b7
IntervalsRoot, Minor 3rd, Tritone, Minor 7th

About the Half Diminished Chord

A half diminished chord is a diminished triad with a flat seventh, the ii chord of a minor key. More about the Half Diminished Chord.

Keys with G#m7b5

These keys have G#m7b5 among their chords:

Scales to play over G#m7b5

Each of these scales holds every note of the chord:

Half Diminished Chord in other keys