Gdim
Gdim is the g diminished chord, spelled G – B♭ – D♭. tense and unstable by design — built from stacked minor thirds, it begs to resolve.
The keys
G – B♭ – D♭
Practise this chord
Plug in your MIDI keyboard and let Coach Tshepho drill you on Gdim — it plays the chord, names any wrong notes as you play, and moves you on when you nail it.
Create your free account →What's inside Gdim
| Note | Interval from root | Degree |
|---|---|---|
| G | Root | 1 |
| B♭ | Minor 3rd | b3 |
| D♭ | Diminished 5th | b5 |
Inversions
| Position | Keys (low → high) |
|---|---|
| Root position | G4 – B♭4 – D♭5 |
| 1st inversion | B♭4 – D♭5 – G5 |
| 2nd inversion | D♭5 – G5 – B♭5 |
A working voicing
Split the chord between two hands the way working players do — a solid shell low down, the colour tones up top:
| Hand | Keys |
|---|---|
| Left (shell) | G2 – G3 |
| Right (colour) | B♭4 – D♭5 |
Where Gdim lives
As the I chord
Gdim → C → D → Gdim
The classic I–IV–V–I motion with this chord as home.
In a ii–V–I
Am7 → D7 → Gdim
The strongest cadence in harmony, resolving onto this chord.
Put Gdim under your fingers
Hear every voicing, see the keys light up, and drill it in the interactive Chord & Voicing Lab.
Open the Chord & Voicing Lab →More G chords
G
Gm
Gaug
Gsus2
Gsus4
G6
Gm6
G7
Gmaj7
Gm7
Gm7♭5
Gdim7
Gm(maj7)
G9
Gmaj9
Gm9
Gadd9
G6/9
Gm11
G13
G7♭9
G7♯9
G7♯5Play it over a groove
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