Chord · G Dominant 9th
G9 Chord
G9 is G, B, D, F and A — funky, soulful; James Brown territory.
G9 on every instrument
The same 5 notes, 4 sets of hands. Open a diagram for alternate shapes, audio and the mistakes to avoid.
What G9 is made of
G9 (G ninth) is built from the notes G, B, D, F, A, with the interval pattern 1, 3, 5, b7, 9.
Stack 1, 3, 5, b7 and 9 on a root of G and you get G, B, D, F and A. That interval recipe is what makes the chord a ninth chord — move the same shape to another root and the character travels with it, which is why C9 sounds like a transposed G9.
Dominant 9th: Funky, soulful; James Brown territory.
Spelling: the notes above are written the way a score would write them, not simplified to the nearest piano key. Every tone here lands on its own letter — no accidentals needed.
Keys that contain G9
All 5 notes sit inside the scale of 2 keys. The roman numeral marks the degree the chord is rooted on.
Major keys
Minor keys
Other chords on G
Same root, different colour.
The same ninth shape, moved
The identical interval recipe, built on other roots.
Questions people ask about G9
- What notes are in the G9 chord?
- G9 is made of G, B, D, F and A — the 1, 3, 5, b7 and 9 degrees of a ninth chord built on G.
- What keys use the G9 chord?
- Every note of G9 belongs to 2 keys: C Major (V), A Minor (VII). The roman numeral is the scale degree the chord is rooted on.
- How do you play G9 on guitar and piano?
- This page shows G9 on guitar, piano, ukulele and mandolin — 8 voicings in total. Each diagram links to the full instrument page with alternate shapes, audio and common mistakes.
Learn the theory behind it
Why G9 behaves the way it does — the guides that explain the chord instead of just spelling it.